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Critical CVE Archive

Browse critical-severity CVEs with CVSS, affected products, CWE, KEV, remediation priorities, and source-backed Glexia context.

Showing 50 of 24996 matching CVEs · Page 77 of 500.

Critical · CVSS 9.8

CVE-2026-84142: Internally found bugs fixed in Thunderbird 155

Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155 and Thunderbird 155.

Published Sep 1, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.8

CVE-2026-84143: Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15

Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

Published Sep 1, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.8

CVE-2026-10522: Simple User Registration <= 6.9 - Unauthenticated Privilege Escalation to Administrator

The MemberHero WordPress plugin through 6.9 does not restrict which account fields can be supplied during its frontend registration process, allowing unauthenticated attackers to register a new user with an arbitrary role, including Administrator, leading to a full site takeover. Version 6.9 is advertised as resolving this issue, but the fix is incomplete and the current version remains exploitable by unauthenticated attackers to obtain administrator access and to take over existing accounts. No version that fully addresses the issue is available at the time of this advisory. Mitigation: deactivate and remove the MemberHero WordPress plugin through 6.9 until a version that fully resolves this issue is released. If the MemberHero WordPress plugin through 6.9 must stay active, disable public registration, restrict access to the registration functionality, and monitor the site for unexpected administrator accounts.

Published Aug 29, 2026 · Updated Sep 3, 2026

Critical · CVSS 9

CVE-2026-85110: Tenda HG10 Boa Web Server formWlanSetup buffer overflow

A vulnerability was identified in Tenda HG10 300001138. Impacted is the function formWlanSetup of the file /boaform/formWlanSetup of the component Boa Web Server. The manipulation of the argument ssid leads to buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 10

CVE-2026-85109: Tenda HG10 Boa Web Server formLogin buffer overflow

A vulnerability was determined in Tenda HG10 300001138. This issue affects the function formLogin of the file /boaform/formLogin of the component Boa Web Server. Executing a manipulation of the argument Username can lead to buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.5

CVE-2026-85216: MISP LDAP and LinOTP Authentication Bypass via Empty or Invalid Credentials

MISP contains an authentication bypass vulnerability in its LDAP and LinOTP authentication components due to insufficient validation of user-supplied credentials. The custom LdapAuthenticate and LinOTPAuthenticate components replace CakePHP's FormAuthenticate implementation but did not replicate its credential validation checks. As a result, empty or non-string values could reach the underlying authentication mechanisms. In the LDAP authentication path, an attacker able to identify a valid directory user's email address could submit an empty password. The empty credential could be passed to ldap_bind(), where an LDAP server accepting unauthenticated binds may return a successful result for a valid distinguished name combined with an empty password. MISP could consequently treat the attacker as the corresponding authenticated directory user without verification of the user's password. The issue also affected the LinOTP authentication component. Invalid credential types were not rejected before being processed, and when mixed authentication was enabled, an empty password could be checked against a locally stored MISP password hash. LDAP-provisioned MISP accounts could additionally be created with an empty local password because account creation skipped normal validation, resulting in a hash corresponding to an empty password. This could permit authentication through the local fallback mechanism when such an account was no longer resolved through LDAP. Successful exploitation could allow a remote unauthenticated attacker to impersonate an existing MISP user. If the targeted account has administrative or other privileged permissions, the attacker could gain corresponding access to sensitive threat-intelligence data, modify or delete information, alter configuration, or perform other privileged operations. The patch resolves the vulnerability by requiring authentication identifiers and passwords to be valid strings, rejecting empty passwords where they are not explicitly permitted, and assigning a randomly generated local password to LDAP-provisioned accounts instead of storing a hash derived from an empty password.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.5

CVE-2026-82180: In Eclipse Arrowhead versions from 5.0.0 to 5.2.1 when the MQTT API is enabled with the certificate authent...

In Eclipse Arrowhead versions from 5.0.0 to 5.2.1 when the MQTT API is enabled with the certificate authentication policy, CertificateMqttFilter parses an X.509 certificate that the client sends inside the MQTT message payload (the authentication field of MqttRequestTemplate) and treats its Subject DN as the authenticated identity. The certificate is decoded with CertificateFactory.generateCertificate() but its signature is never verified and its issuer chain is never validated against any trust store. Authorisation is reduced to two string comparisons on attacker-supplied data: the DN-qualifier must equal "sy" or "op", and the cloud-name part of the CN must match the server's. Both values are public (the cloud name is in the server's own TLS certificate). An attacker who can publish to the MQTT broker can therefore mint a self-signed certificate with CN=Sysop.<cloud>.<org>.arrowhead.eu, dnQualifier=op, send it as the authentication field, and be authenticated as the cloud's system operator with isSysOp == true. This passes the downstream ManagementServiceMqttFilter (request.isSysOp() → allowed) and gives full management access over MQTT. The HTTP CertificateFilter is not affected — it reads the certificate from jakarta.servlet.request.X509Certificate, which Tomcat populates only after a successful mTLS handshake against the configured trust store.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.1

CVE-2026-82281: Kotaemon Missing Ownership Check in Conversation Functions

Kotaemon through 0.12.0 fails to properly validate conversation ownership in select_conv, delete_conv, rename_conv, and on_set_public_conversation functions in control.py. Attackers can read other users' chat histories, delete conversations, or rename conversations by supplying arbitrary conversation identifiers without proper authorization checks.

Published Aug 28, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.5

CVE-2026-78069: Joomla Extension - j2commerce.com - Missing authorization on Apps controller delegation chain in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6

Joomla Extension - j2commerce.com - Missing authorization on Apps controller delegation chain in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - `J2StoreControllerApps`'s `appTask` delegation path instantiates app-plugin controllers with no ACL check anywhere in the code. It currently returns 403 only as a side effect of `fof.xml`'s wildcard-deny resolving under the singularised ACL key `app`, which has no explicit allow rule — not because of any deliberate check. Behind that path, `applocalizationdata::getInstallerTool()` used a caller-influenced table name with no allow-list, both to select a `#__j2store_*` table for truncation and to build a path to SQL files it then executes — a path-traversal-capable file read/execute.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.4

CVE-2026-76174: Multiple vulnerabilities in Ocsreports for OCS Inventory NG

Unrestricted file upload vulnerability in the CSV file upload functionality of the Ocsreports admin_info endpoint. The application validates files solely based on the name provided by the client, without properly checking their content or securely restricting the permitted file types. This allows a user with administrator privileges to upload PHP files to a directory accessible via the web interface. If the file is subsequently processed by the server, an attacker could execute arbitrary code with the privileges of the account used by the web service.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.9

CVE-2026-85031: TOTOLINK CP450 cstecgi.cgi buffer overflow

A vulnerability was found in TOTOLINK CP450 4.1.0. The impacted element is an unknown function of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument topicurl results in buffer overflow. Remote exploitation of the attack is possible.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.2

CVE-2026-76178: Multiple vulnerabilities in Ocsreports for OCS Inventory NG

A stored Cross-Site Scripting (XSS) vulnerability in the notification template functionality of the endpoint /ocsreports/?function=notification. A user with administrator privileges can input malicious HTML content which is subsequently stored and displayed without proper sanitisation when other administrators access the template customisation view, allowing JavaScript code to be executed within the application’s security context and potentially compromising the sessions of other users with administrative privileges.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.8

CVE-2026-85154: WWBN AVideo Authentication Bypass via Non-Expiring video_id_hash

WWBN AVideo contains an authentication failure vulnerability where the video_id_hash credential is a non-expiring, non-revocable bearer token that grants full administrator session access to the video owner's account. Attackers who obtain a video_id_hash can replay it indefinitely to authenticate as the video owner with full privileges, and the credential remains valid even after the owner changes their password.

Published Sep 3, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.2

CVE-2026-78689: NGINX ngx_http_js_module vulnerablility

Description NGINX JavaScript (njs) has a vulnerability in the XML module's namespace prefix list parser, reachable through the xml.exclusiveC14n() method. An unauthenticated remote attacker can trigger it when an affected NGINX configuration passes an externally controlled XML namespace prefix list to that method. Both the njs and the QuickJS (qjs) engines are affected. A crafted prefix list causes an out-of-bounds write past the end of a heap allocation. With the njs engine, which is the engine used when the js_engine directive is absent, this corrupts adjacent objects and crashes the NGINX worker. With the QuickJS engine, the same call additionally leaks the prefix list on every invocation, causing worker memory to grow across requests. The official nginxinc/nginx-saml reference implementation is affected during SAML signature verification. It reads InclusiveNamespaces/@PrefixList from an untrusted SAML message and passes it to xml.exclusiveC14n() before the signature has been verified, so a valid SAML signature is not required. A crafted SAML Response, Assertion, LogoutRequest, or LogoutResponse is sufficient. Code execution has not been demonstrated and cannot be ruled out for all platforms, as the effect of the out-of-bounds write depends on conditions beyond the attacker's control.   Impact This vulnerability allows remote attackers to cause a denial of service on the NGINX system, either through repeatable worker restarts or through worker memory growth or possibly trigger code execution. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Published Sep 2, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.8

CVE-2026-20212: Cisco Nexus 3000 and 9000 Series Switches Silicon One Hardware Abstraction Layer Remote Code Execution Vulnerability

A vulnerability in the Silicon One integration for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute code with&nbsp;root privileges. This vulnerability exists because TCP ports 43210 and 43211 are accessible in the default Layer 3 (L3) virtual routing and forwarding (VRF). A successful exploit could allow the attacker to connect to an affected device and send crafted input that could be executed as code with&nbsp;root privileges. The exploitation of this vulnerability could also cause the S1HAL process to crash, which could cause the device to reload.

Published Sep 2, 2026 · Updated Sep 3, 2026

Critical · CVSS 10 · CISA KEV

CVE-2026-83548: A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unin...

A Pre-authentication SSRF vulnerability exists in the SMA1000 Appliance Work Place interface due to an unintended alternate access path. A remote unauthenticated attacker could potentially exploit this vulnerability to gain unauthorized access to sensitive functionality and perform unauthorized operations.

Published Sep 1, 2026 · Updated Sep 3, 2026

Critical · CVSS 9.3 · CISA KEV

CVE-2026-9586: Unauthenticated SQL Injection Leading to Remote Code Execution in Switchvox SMB

An unauthenticated SQL injection vulnerability exists in Sangoma Switchvox SMB Edition 8.3 (104997). The /pa endpoint processes XML content beginning with <PolycomIPPhone> and directly concatenates the user-controlled PhoneIP value into PostgreSQL queries without sanitization or parameterization. An unauthenticated remote attacker can execute arbitrary SQL statements against the backend PostgreSQL database using a single crafted request, including database operations and remote code execution.

Published Jul 17, 2026 · Updated Sep 3, 2026

Critical · CVSS 10 · CISA KEV

CVE-2026-49869: Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter`

Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in Kestra OSS uses request.getPath().endsWith("/configs") to whitelist the public configuration endpoint from Basic Auth. Because the check is a suffix match rather than an exact path match, any API path whose last segment is configs bypasses authentication entirely. An unauthenticated remote attacker can exploit this to create and execute arbitrary workflows without credentials. Because Kestra ships with script execution plugins (plugin-script-shell, plugin-script-python, etc.) enabled by default, this directly results in unauthenticated Remote Code Execution as root inside the Kestra worker container. This vulnerability is fixed in 1.0.45 and 1.3.21.

Published Jun 26, 2026 · Updated Sep 3, 2026

Critical · CVSS 10

CVE-2026-18886: Unauthenticated Privilege Escalation via System Configuration Image Upload Processor

ServiceNow has remediated an improper access control vulnerability that was identified in the ServiceNow AI platform. This vulnerability could enable an unauthenticated user, in certain circumstances, to create or modify instance data beyond what was intended, resulting in privilege escalation.  ServiceNow deployed a security update to hosted instances and ServiceNow provided the update to our partners and self-hosted customers. We are not currently aware of exploitation against ServiceNow instances.  We recommend customers promptly apply appropriate updates or upgrade to a patched release if they have not already done so.

Published Aug 27, 2026 · Updated Sep 2, 2026

Critical · CVSS 9.8

CVE-2026-84372: Predis: Redis command injection and denial of service via CRLF smuggling in pipelined commands on aggregate connections

Predis is a flexible and feature-complete Redis and Valkey client for PHP. From version 3.0.0-RC1 until version 3.3.0, pipeline handling on aggregate cluster and replication connections reparses an already serialized RESP buffer in AbstractAggregateConnection::write() by splitting it with explode("\r\n") instead of honoring RESP length prefixes. Attacker-controlled keys or values containing CRLF sequences can therefore be interpreted by Command::deserializeCommand() as additional commands. On cluster connections, ClusterStrategy::getFakeKey() can route injected keyless commands using the literal fake key value "key", permitting operations such as shard-wide cache deletion, targeted data modification, data reads, or node disruption. On replication connections, malformed reparsing can throw an uncaught exception and repeatedly terminate affected requests. Only pipeline() reaches this vulnerable path; transaction() and MULTI are not affected. This issue is fixed in version 3.3.0.

Published Sep 1, 2026 · Updated Sep 2, 2026

Critical · CVSS 9.8

CVE-2026-84637: Calendar invitation attachments could launch local executables

Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on Windows, bypassing Thunderbird's normal executable attachment protections. With the new invitation display enabled, the attachment could also appear under a misleading filename. This vulnerability was fixed in Thunderbird 154 and Thunderbird 153.2.

Published Sep 1, 2026 · Updated Sep 2, 2026