CVE-2026-42930: CWE-35 Path Traversal: '.../...//' in F5 BIG-IP
When running in Appliance mode, an authenticated attacker assigned the 'Administrator' role may be able to bypass Appliance mode restrictions on a BIG-IP system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI Analysis
Technical Summary
This vulnerability involves a path traversal flaw in F5 BIG-IP when operating in Appliance mode. An attacker with Administrator-level authentication can potentially bypass the restrictions imposed by Appliance mode, which is designed to limit system functionality. The issue is tracked as CWE-35 and has a CVSS v3.1 base score of 8.7, indicating high impact on confidentiality and integrity. Affected versions include 21.0.0, 17.5.0, 17.1.0, and 16.1.0. The vendor has not published a patch or official remediation at this time, and the software versions evaluated exclude those that have reached End of Technical Support.
Potential Impact
Successful exploitation allows an authenticated Administrator to bypass Appliance mode restrictions, potentially leading to unauthorized access or modification of sensitive system components. The CVSS score of 8.7 reflects high confidentiality and integrity impact, with no impact on availability. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Administrator role access to trusted personnel only and monitor for suspicious activity related to Appliance mode bypass attempts. Follow F5's official communications for updates on patches or mitigations.
CVE-2026-42930: CWE-35 Path Traversal: '.../...//' in F5 BIG-IP
Description
When running in Appliance mode, an authenticated attacker assigned the 'Administrator' role may be able to bypass Appliance mode restrictions on a BIG-IP system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a path traversal flaw in F5 BIG-IP when operating in Appliance mode. An attacker with Administrator-level authentication can potentially bypass the restrictions imposed by Appliance mode, which is designed to limit system functionality. The issue is tracked as CWE-35 and has a CVSS v3.1 base score of 8.7, indicating high impact on confidentiality and integrity. Affected versions include 21.0.0, 17.5.0, 17.1.0, and 16.1.0. The vendor has not published a patch or official remediation at this time, and the software versions evaluated exclude those that have reached End of Technical Support.
Potential Impact
Successful exploitation allows an authenticated Administrator to bypass Appliance mode restrictions, potentially leading to unauthorized access or modification of sensitive system components. The CVSS score of 8.7 reflects high confidentiality and integrity impact, with no impact on availability. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Administrator role access to trusted personnel only and monitor for suspicious activity related to Appliance mode bypass attempts. Follow F5's official communications for updates on patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- f5
- Date Reserved
- 2026-04-30T23:04:27.939Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a049717cbff5d8610e00315
Added to database: 5/13/2026, 3:21:59 PM
Last enriched: 5/13/2026, 3:39:00 PM
Last updated: 5/14/2026, 6:46:06 AM
Views: 5
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