Security readout for executives and security teams
Plain-English summary
CVE-2026-24435 affects Tenda W30E V2 routers. If an administrator is logged into the device, a malicious website could potentially use that browser session to read sensitive administrative data across origins. The source bundle does not show public exploitation or a confirmed vendor patch.
Executive priority
Prioritize remediation for deployed W30E V2 devices used in business networks, especially where administrators manage devices from everyday browsing workstations. Business risk is sensitive configuration or administrative data exposure, not confirmed device takeover from the provided sources.
Technical view
The device exposes authenticated administrative endpoints with an unsafe CORS configuration: Access-Control-Allow-Origin: * combined with Access-Control-Allow-Credentials: true. This is CWE-942 and affects W30E V2 firmware up to and including V16.01.0.19(5037). The CVSS 4.0 score is 7.1, driven mainly by high confidentiality impact and required user interaction.
Likely exposure
Exposure is most likely where Tenda W30E V2 administration is reachable from user workstations and administrators browse the web while authenticated to the device. Internet-exposed management interfaces would increase concern, but the bundle does not confirm exposure prevalence.
Exploitation context
The bundle does not report active exploitation, and the CVE is not marked KEV. Exploitation requires user interaction, likely an authenticated administrator visiting or loading attacker-controlled web content while the browser can reach the device management interface.
Researcher notes
The key evidence is the contradictory credentialed CORS policy on authenticated admin endpoints. The source bundle does not provide proof-of-concept details, exploit telemetry, or a named fixed firmware version. Treat patch status and exact operational impact as incomplete until vendor guidance is available.
Mitigation direction
- Check Tenda guidance for updated firmware or an official mitigation.
- Restrict administrative access to trusted management networks only.
- Avoid internet exposure of the device management interface.
- Require administrators to log out after management sessions.
- Use a dedicated browser profile or workstation for device administration.
Validation and detection
- Inventory Tenda W30E V2 devices and record firmware versions.
- Identify devices running firmware up to V16.01.0.19(5037).
- Review administrative endpoint CORS headers in a controlled authenticated test.
- Confirm management interfaces are not reachable from general user networks.
- Monitor vendor and CVE sources for patch or advisory changes.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-942: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-24435 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N——VulnCheckVulnerability scoring details
Base CVSS 4.0 score
7.1HighVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.tendacn.com/product/W30ECVE reference, VulnCheck · product
- https://www.vulncheck.com/advisories/tenda-w30e-v2-permissive-cors-allows-cross-origin-data-accessCVE reference, VulnCheck · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Permissive Cross-domain Security Policy with Untrusted Domains
Permissive Cross-domain Security Policy with Untrusted Domains represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.