CVE-2025-21091
HIGHCVSS 8.7/10EPSS 0.42%
Last modified
CVE-2025-21091 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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. EPSS estimates a 0.42% chance of exploitation in the next 30 days.
Description
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
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| F5 | Big-Ip Access Policy Manager | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Advanced Firewall Manager | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Analytics | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Application Acceleration Manager | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Application Security Manager | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Application Visibility And Reporting | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Automation Toolchain | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Carrier-Grade Nat | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Container Ingress Services | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Ddos Hybrid Defender | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Domain Name System | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Edge Gateway | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Fraud Protection Service | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Global Traffic Manager | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Link Controller | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Local Traffic Manager | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Policy Enforcement Manager | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Ssl Orchestrator | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Webaccelerator | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Websafe | >= 15.1.0, <= 15.1.10 |
| F5 | Big-Ip Access Policy Manager | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Advanced Firewall Manager | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Analytics | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Application Acceleration Manager | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Application Security Manager | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Application Visibility And Reporting | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Automation Toolchain | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Carrier-Grade Nat | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Container Ingress Services | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Ddos Hybrid Defender | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Domain Name System | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Edge Gateway | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Fraud Protection Service | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Global Traffic Manager | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Link Controller | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Local Traffic Manager | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Policy Enforcement Manager | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Ssl Orchestrator | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Webaccelerator | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Websafe | >= 16.1.0, < 16.1.6 |
| F5 | Big-Ip Access Policy Manager | >= 17.1.0, < 17.1.2 |
| F5 | Big-Ip Advanced Firewall Manager | >= 17.1.0, < 17.1.2 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 17.1.0, < 17.1.2 |
| F5 | Big-Ip Analytics | >= 17.1.0, < 17.1.2 |
| F5 | Big-Ip Application Acceleration Manager | >= 17.1.0, < 17.1.2 |
| F5 | Big-Ip Application Security Manager | >= 17.1.0, < 17.1.2 |
| F5 | Big-Ip Application Visibility And Reporting | >= 17.1.0, < 17.1.2 |
| F5 | Big-Ip Automation Toolchain | >= 17.1.0, < 17.1.2 |
Showing 50 of 63 affected configurations. See NVD for the full list.
References
- https://my.f5.com/manage/s/article/K000140933Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-21091?
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
How severe is CVE-2025-21091?
CVE-2025-21091 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.
How do I fix CVE-2025-21091?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2025-21091?
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