CVE-2020-27718: f5 big-ip_advanced_web_application_firewall
Vulnerability summary
CVE-2020-27718 is a high (CVSS 7.5) vulnerability in f5 big-ip_advanced_web_application_firewall. EPSS estimates a 1.04% chance of exploitation in the next 30 days, higher than 63.8% of scored vulnerabilities.
Timeline
- 24-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
When a BIG-IP ASM or Advanced WAF system running version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, or 11.6.1-11.6.5.2 processes requests with JSON payload, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.04%
Chance of exploitation in the next 30 days
Percentile
64%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.04% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
F52 products
- big-ip_advanced_web_application_firewall≥ 11.6.1, ≤ 11.6.5 | ≥ 12.1.0, ≤ 12.1.5 | ≥ 13.1.0, < 13.1.3.5 | ≥ 14.1.0, < 14.1.3.1 | ≥ 15.0.0, < 15.1.1 | ≥ 16.0.0, < 16.0.1
- big-ip_application_security_manager≥ 11.6.1, ≤ 11.6.5 | ≥ 12.1.0, ≤ 12.1.5 | ≥ 13.1.0, < 13.1.3.5 | ≥ 14.1.0, < 14.1.3.1 | ≥ 15.0.0, < 15.1.1 | ≥ 16.0.0, < 16.0.1
1 vendor · 2 products