CVE-2025-21087: f5 big-ip Uncontrolled Resource Consumption
CVSS: 8.9v4.0HighAnalyzed
Published 05-02-2025Last modified 05-02-2025
Vulnerability summary
CVE-2025-21087 is a high (CVSS 8.9) Uncontrolled Resource Consumption vulnerability in f5 big-ip. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.6% of scored vulnerabilities.
CVSS score
8.9/10
010
High · v4.0 (CVE.org)EPSS score
0.41%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 05-02-2025PublishedVulnerability first disclosed.
- 05-02-2025Last modifiedVulnerability information updated.
Description
When Client or Server SSL profiles are configured on a Virtual Server, or DNSSEC signing operations are in use, undisclosed traffic can cause an increase in memory and CPU resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated
CVSS metrics
4 scores · 2 sources · 2 versionsHigh 8.9Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:HSourcesAll 2 agree
- NVDNIST8.9HighCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/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
High 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- 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 19-09-2026
19-09-202619-10-2026
EPSS score0.41%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
F523 products
- big-ip≥ 17.1.0, < 17.1.2 | ≥ 16.1.0 (No fix recorded) | ≥ 15.1.0 (No fix recorded)
- big-ip_access_policy_manager≥ 15.1.0, ≤ 15.1.10 | ≥ 16.1.0, < 16.1.6 | ≥ 17.1.0, < 17.1.2
- big-ip_advanced_firewall_manager≥ 15.1.0, ≤ 15.1.10 | ≥ 16.1.0, < 16.1.6 | ≥ 17.1.0, < 17.1.2
- big-ip_advanced_web_application_firewall≥ 15.1.0, ≤ 15.1.10 | ≥ 16.1.0, < 16.1.6 | ≥ 17.1.0, < 17.1.2
- big-ip_analytics≥ 15.1.0, ≤ 15.1.10 | ≥ 16.1.0, < 16.1.6 | ≥ 17.1.0, < 17.1.2
1 vendor · 23 products
References
1 links- my.f5.com/manage/s/article/K000134888Vendor Advisory