Security readout for executives and security teams
Apache HTTP Server 2.4.49 can expose files outside intended web directories through path traversal. Apache reports exploitation in the wild, and CISA KEV confirms active risk. Remote code execution is possible only when CGI scripts are enabled for affected aliased paths. Internet-facing Apache HTTP Server 2.4.49 instances are the main concern, especially systems using Alias-like directives or CGI. Earlier versions are not affected by this CVE. Apache 2.4.50 requires separate attention because the stated fix was incomplete and tracked as CVE-2021-42013. Prioritize remediation immediately for internet-facing Apache 2.4.49, because exploitation is known and exposure can lead to sensitive file disclosure. Escalate further if CGI is enabled, since the business impact may shift from data exposure to server compromise. Mitigation focus: Upgrade Apache HTTP Server 2.4.49 according to current Apache guidance.; Do not treat Apache 2.4.50 as a complete fix; review CVE-2021-42013 guidance.; Ensure files outside intended web roots are protected by require all denied..
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
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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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-41773 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
- 7.5 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A: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.
CISA KEV status
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://httpd.apache.org/security/vulnerabilities_24.htmlCVE reference · x_refsource_MISC
- [httpd-users] 20211005 [users@httpd] CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49CVE reference · mailing-list, x_refsource_MLIST
- [announce] 20211005 CVE-2021-41773: Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49CVE reference · mailing-list, x_refsource_MLIST
- [announce] 20211007 CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)CVE reference · mailing-list, x_refsource_MLIST
- [httpd-users] 20211007 [users@httpd] CVE-2021-42013: Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)CVE reference · mailing-list, x_refsource_MLIST
- 20211007 Apache HTTP Server Vulnerabilties: October 2021CVE reference · vendor-advisory, x_refsource_CISCO
- [httpd-cvs] 20211008 [httpd-site] branch main updated: * Align with CVE-2021-42013 based on the latest findingsCVE reference · mailing-list, x_refsource_MLIST
- FEDORA-2021-2a10bc68a4CVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-aaf90ef84aCVE reference · vendor-advisory, x_refsource_FEDORA
- https://www.oracle.com/security-alerts/cpujan2022.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20211029-0009/CVE reference · x_refsource_CONFIRM
- GLSA-202208-20CVE reference · vendor-advisory, x_refsource_GENTOO
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-41773CVE reference · government-resource
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.