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CVE-2026-20732— BIG-IP Configuration utility vulnerability

Quick assessment

Affected
F5 BIG-IP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

F5 BIG-IP是美国F5公司的一款集成了网络流量管理、应用程序安全管理、负载均衡等功能的应用交付平台。 F5 BIG-IP存在安全漏洞，该漏洞源于可能允许攻击者伪造错误消息。

CVSS 3.1 · Low EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1072 · Software Deployment Tools
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I. Basic Information for CVE-2026-20732

Vulnerability Information
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Vulnerability Title
BIG-IP Configuration utility vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability exists in an undisclosed BIG-IP Configuration utility page that may allow an attacker to spoof error messages.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键信息的UI错误表达
Source: CVE Program / CVE List V5
Vulnerability Title
F5 BIG-IP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 BIG-IP是美国F5公司的一款集成了网络流量管理、应用程序安全管理、负载均衡等功能的应用交付平台。 F5 BIG-IP存在安全漏洞，该漏洞源于可能允许攻击者伪造错误消息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 BIG-IP 21.0.0 ~ * -

II. Public POCs for CVE-2026-20732

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III. Intelligence Information for CVE-2026-20732

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Vendor Advisories for CVE-2026-20732 (1)

Same Patch Batch · F5 · 2026-02-04 · 5 CVEs total

CVE-2026-22548 5.9 MEDIUM BIG-IP Advanced WAF and ASM vulnerability
CVE-2026-1642 5.9 MEDIUM NGINX vulnerability
CVE-2026-22549 4.9 MEDIUM BIG-IP Container Ingress Services vulnerability
CVE-2026-20730 3.3 LOW BIG-IP Edge Client for Windows vulnerability

IV. Related Vulnerabilities

Same product: BIG-IP
Same vendor: F5
Same weakness: CWE-451