Background exploitation KEV catalog Ransomware No authentication

CVE-2020-5902

F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability

In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, the Traffic Management User Interface (TMUI), also referred to as the Configuration utility, has a Remote Code Execution (RCE)…

CheckOps priority index

9.9/10 Patch within 24 h

Severity9.8

Probability10.0

Exploitation5/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 100.00% higher than 100.0% of CVEs

CVSS 3.1 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:

Exploited for 1,826 days 03 Nov 2021

CISA due date 03 May 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 5 / 5

KEV catalog (CISA)03 Nov 2021
Exploited in EUVD (ENISA)03 Nov 2021
Used by ransomwareyes
EPSS above 10 %100.00%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

Affected products

BIG-IP

Affected versions

15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, 11.6.1-11.6.5.1

Weaknesses (CWE)

CWE-22

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

01 Jul 2020
Published
03 Nov 2021
Exploitation reported (ENISA)
03 Nov 2021
Added to the KEV catalog
03 May 2022
CISA remediation due date
26 Sept 2026
EPSS peak: 100.00%

References

Other exploited vulnerabilities from the same vendor

CVE-2026-94127F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability
6.9 · Actively exploited
CVE-2025-53521F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
5.6 · Background exploitation
CVE-2023-46748F5 BIG-IP Configuration Utility SQL Injection Vulnerability
4.8 · Background exploitation
CVE-2023-46747F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability
9.8 · Background exploitation
CVE-2022-1388F5 BIG-IP Missing Authentication Vulnerability
9.9 · Background exploitation
CVE-2021-22991F5 BIG-IP Traffic Management Microkernel Buffer Overflow
8.2 · Background exploitation