CVE-2026-41959: CWE-732 Incorrect Permission Assignment for Critical Resource in F5 BIG-IP
Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) network diagnostics commands and in BIG-IP iControl REST. These vulnerabilities may allow an authenticated attacker to view the network status of destination systems. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-41959) in F5 BIG-IP and BIG-IQ products arises from incorrect permission assignments (CWE-732) in TMOS Shell network diagnostics commands and iControl REST interfaces. Authenticated users with certain privileges may gain unauthorized read access to network status information of destination systems. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and high confidentiality impact without integrity or availability impact. Affected versions include 21.0.0, 17.5.0, 17.1.0, and 16.1.0. No official remediation or patch is currently documented, and no known exploits have been reported.
Potential Impact
An authenticated attacker with appropriate privileges could view sensitive network status information of destination systems via TMOS Shell commands or iControl REST API. This unauthorized information disclosure could aid in reconnaissance but does not directly affect system integrity or availability. There are no known active exploits targeting this vulnerability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user privileges to the minimum necessary and monitor access to TMOS Shell and iControl REST interfaces to limit exposure.
CVE-2026-41959: CWE-732 Incorrect Permission Assignment for Critical Resource in F5 BIG-IP
Description
Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) network diagnostics commands and in BIG-IP iControl REST. These vulnerabilities may allow an authenticated attacker to view the network status of destination systems. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-41959) in F5 BIG-IP and BIG-IQ products arises from incorrect permission assignments (CWE-732) in TMOS Shell network diagnostics commands and iControl REST interfaces. Authenticated users with certain privileges may gain unauthorized read access to network status information of destination systems. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, required privileges, no user interaction, and high confidentiality impact without integrity or availability impact. Affected versions include 21.0.0, 17.5.0, 17.1.0, and 16.1.0. No official remediation or patch is currently documented, and no known exploits have been reported.
Potential Impact
An authenticated attacker with appropriate privileges could view sensitive network status information of destination systems via TMOS Shell commands or iControl REST API. This unauthorized information disclosure could aid in reconnaissance but does not directly affect system integrity or availability. There are no known active exploits targeting this vulnerability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict authenticated user privileges to the minimum necessary and monitor access to TMOS Shell and iControl REST interfaces to limit exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- f5
- Date Reserved
- 2026-04-30T23:04:20.043Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a049711cbff5d8610dff67a
Added to database: 05/13/2026, 15:21:53 UTC
Last enriched: 05/13/2026, 15:52:56 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 54
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