BIG-IP
CVE-2026-41959: iControl and tmsh REST vulnerability
Incorrect permission assignment vulnerabilities exist in BIG-IP and BIG-IQ TMOS Shell (tmsh) network diagnostics commands and in BIG-IP iControl REST.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| BIG-IP 21.1 | Not affected |
| BIG-IP 21.0 | 21.0.0.2 or later |
| BIG-IP 17.5 | 17.5.1.6 or later |
| BIG-IP 17.1 | 17.1.3.2 or later |
| BIG-IP 16.1 | * or later |
| BIG-IQ 8.4 | * or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.