BIG-IP
CVE-2025-21091: BIG-IP SNMP vulnerability
When SNMP v1 or v2c are disabled on the BIG-IP, undisclosed requests can cause an increase in memory resource utilization.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityHIGHCVSS 4.0 8.7
EPSS0.45%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
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 17.1 | 17.1.2 or later |
| BIG-IP 16.1 | Hotfix-BIGIP-16.1.5.2.0.7.5-ENG.iso or later |
| BIG-IP 15.1 | Hotfix-BIGIP-15.1.10.6.0.11.6-ENG.iso or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
When SNMP v1 or v2c are disabled on the BIG-IP, undisclosed requests can cause an increase in memory resource utilization.
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.