F5 BIG-IP

CVE-2020-5902: F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, 490 days after the CVE record was published.

How likely is exploitation in the next 30 days?

100%

EPSS score, percentile 100 of all scored records

How severe?

9.8 Critical

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 3 May 2022. Apply updates per vendor instructions.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

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…

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

Apply updates per vendor instructions.

CISA due date for this action: 3 May 2022.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

https://nvd.nist.gov/vuln/detail/CVE-2020-5902

Affected products and versions

As listed in the CVE record.

n/a BIG-IP
Status	Versions
Affected	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…

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

F5 BIG-IP Traffic Management User Interface (TMUI) contains a remote code execution vulnerability in undisclosed pages.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

CISA added CVE-2020-5902 to its Known Exploited Vulnerabilities (KEV) catalog on 3 Nov 2021.
CISA marks it as known to be used in ransomware campaigns.
The due date CISA sets for the required action is 3 May 2022.
The CVE record was published on 1 Jul 2020, 490 days before it was added to KEV.
The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), taken from CISA's enrichment of the record.
FIRST's EPSS model puts the probability of exploitation in the next 30 days at 100% (percentile 100), as of 28 Oct 2026.
CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

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) vulnerability in undisclosed pages.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

Date	Event
1 Jul 2020	CVE record published
3 Nov 2021	Added to CISA KEV
3 May 2022	CISA due date for the required action
21 Oct 2025	CVE record last updated

References

More exploited F5 vulnerabilities

CVE-2026-94127: F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability (added 22 Sep 2026)
CVE-2025-53521: F5 BIG-IP Stack-Based Buffer Overflow Vulnerability (added 27 Mar 2026)
CVE-2023-46747: F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability (added 31 Oct 2023)
CVE-2023-46748: F5 BIG-IP Configuration Utility SQL Injection Vulnerability (added 31 Oct 2023)
CVE-2022-1388: F5 BIG-IP Missing Authentication Vulnerability (added 10 May 2022)
CVE-2021-22991: F5 BIG-IP Traffic Management Microkernel Buffer Overflow (added 18 Jan 2022)