TI-2020-16806 Aliases CVE-2020-27718 GHSA-gmqq-hrf4-4gvf

When a BIG-IP ASM or Advanced WAF system running version 16.0.0-16.0.0.1…

LOW 35Published 2020-12-24 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.01044 64th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	BIG-IP ASM & Advanced WAF	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, 11.6.1-11.6.5.2	—	No fix listed	CNA

BIG-IP ASM & Advanced WAF Vendor— Affected 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, 11.6.1-11.6.5.2 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:f5:big-ip_advanced_web_application_firewall::::::::	11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1; 16.0.0 to before 16.0.1	Vulnerable	F5
cpe:2.3:a:f5:big-ip_application_security_manager::::::::	11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1; 16.0.0 to before 16.0.1	Vulnerable	F5

cpe:2.3:a:f5:big-ip_advanced_web_application_firewall:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1; 16.0.0 to before 16.0.1 Vulnerable ·F5
cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:* Versions 11.6.1 – 11.6.5; 12.1.0 – 12.1.5; 13.1.0 to before 13.1.3.5; 14.1.0 to before 14.1.3.1; 15.0.0 to before 15.1.1; 16.0.0 to before 16.0.1 Vulnerable ·F5

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-27718
2026-10-03 Alias added: GHSA-gmqq-hrf4-4gvf

References

Advisory 1

https://support.f5.com/csp/article/K58102101

TI-2023-25230 BIG-IP Configuration utility unauthenticated remote code execution vulnerability KEVCVSS 3.1CRITICAL 9.8
TI-2021-05850 Memory corruption in BIG-IP KEVCVSS 3.1CRITICAL 9.8
TI-2021-05845 Server-side request forgery in BIG-IP; BIG-IQ KEVCVSS 3.1CRITICAL 9.8
TI-2020-04820 Path traversal in BIG-IP KEVCVSS 3.1CRITICAL 9.8
TI-2023-25231 BIG-IP Configuration utility authenticated SQL injection vulnerability KEVCVSS 3.1HIGH 8.8
TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5

See all 194 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences