CVE-2025-20045: f5 big-ip NULL Pointer Dereference
Vulnerability summary
CVE-2025-20045 is a high (CVSS 8.7) NULL Pointer Dereference vulnerability in f5 big-ip. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.5% of scored vulnerabilities.
Timeline
- 05-02-2025PublishedVulnerability first disclosed.
- 05-02-2025Last modifiedVulnerability information updated.
Description
When SIP session Application Level Gateway mode (ALG) profile with Passthru Mode enabled and SIP router ALG profile are configured on a Message Routing type virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS metrics
4 scores · 2 sources · 2 versions- NVDNIST8.7HighCVSS: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
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.41%
Chance of exploitation in the next 30 days
Percentile
34%
Versus all other CVEs
30-day change
0.00 pp
From 0.41% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
F522 products
- big-ip≥ 17.1.0, < 17.1.2 | ≥ 16.1.0, < 16.1.5 | ≥ 15.1.0 (No fix recorded)
- big-ip_access_policy_manager≥ 15.1.0, ≤ 15.1.10 | ≥ 16.1.0, < 16.1.5 | ≥ 17.1.0, < 17.1.2
- big-ip_advanced_firewall_manager≥ 15.1.0, ≤ 15.1.10 | ≥ 16.1.0, < 16.1.5 | ≥ 17.1.0, < 17.1.2
- big-ip_advanced_web_application_firewall≥ 15.1.0, ≤ 15.1.10 | ≥ 16.1.0, < 16.1.5 | ≥ 17.1.0, < 17.1.2
- big-ip_analytics≥ 15.1.0, ≤ 15.1.10 | ≥ 16.1.0, < 16.1.5 | ≥ 17.1.0, < 17.1.2
1 vendor · 22 products
References
1 links- my.f5.com/manage/s/article/K000138932Vendor Advisory