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Fencer Intel
critical 9.8

CVE-2020-5902 kev+ ransomware in the critical feed json

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 Int…

published 6y ago modified 4mo ago also EUVD-2020-27056

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2021-11-03, used in ransomware
epss
100.0%
EPSS 100.0% chance of exploitation in 30 days, percentile 100%
public exploits
4
Metasploit and Exploit-DB, plus a Nuclei check

Summary

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.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • f5 big-ip_access_policy_manager 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.1.0.4
  • f5 big-ip_advanced_firewall_manager 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_advanced_web_application_firewall 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_analytics 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_application_acceleration_manager 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_application_security_manager 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_ddos_hybrid_defender 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_domain_name_system 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_fraud_protection_service 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_global_traffic_manager 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_link_controller 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_local_traffic_manager 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 big-ip_policy_enforcement_manager 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4
  • f5 ssl_orchestrator 11.6.5.2, 12.1.5.2, 13.1.3.4, 14.1.2.6, 15.0.1.4, 15.1.0.4

Is CVE-2020-5902 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. First public exploit (Metasploit exploit/linux/http/f5_bigip_tmui_rce_cve_2020_5902)
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
5y ago
Patch by
2022-05-03 (4y ago)
Ransomware
Known to be used in ransomware campaigns
Required action
Apply updates per vendor instructions.
Vendor, product
F5, BIG-IP
CISA name
F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1133 External Remote Services exploitation
  • T1190 Exploit Public-Facing Application exploitation
  • T1059 Command and Scripting Interpreter primary impact
  • T1003 OS Credential Dumping secondary impact
  • T1005 Data from Local System secondary impact
  • T1070.004 File Deletion secondary impact
  • T1552 Unsecured Credentials secondary impact
  • T1562.001 Disable or Modify Tools secondary impact

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
last yr.

Exploit prediction

100.00% chance of exploitation in the next 30 days, higher than 100% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Metasploit exploit/linux/http/f5_bigip_tmui_rce_cve_2020_5902 F5 BIG-IP TMUI Directory Traversal and File Upload RCE metasploit exploit, average rank, 2020-06-30
  • EDB-48711 F5 Big-IP 13.1.3 Build 0.0.6 - Local File Inclusion webapps, 2020-07-26
  • EDB-48643 BIG-IP 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 - Traffic Management User Interface 'TMUI' Remote Code Execution (PoC) webapps, 2020-07-05
  • EDB-48642 BIG-IP 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 - Traffic Management User Interface 'TMUI' Remote Code Execution webapps, 2020-07-06
  • Nuclei template F5 BIG-IP TMUI - Remote Code Execution nuclei detection template
  • packetstormsecurity.com http://packetstormsecurity.com/files/158333/BIG-IP-TMUI-Remote-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/158366/F5-BIG-IP-TMUI-Directory-Traversal-File-Upload-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified
  • criticalstart.com https://www.criticalstart.com/f5-big-ip-remote-code-execution-exploit/ referenced PoC, tagged "exploit" by a source, unverified
  • badpackets.net https://badpackets.net/over-3000-f5-big-ip-endpoints-vulnerable-to-cve-2020-5902/ referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/Critical-Start/Team-Ares/tree/master/CVE-2020-5902 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/158581/F5-Big-IP-13.1.3-Build-0.0.6-Local-File-Inclusion.html referenced PoC, tagged "exploit" by a source, unverified
  • swarm.ptsecurity.com https://swarm.ptsecurity.com/rce-in-f5-big-ip/ referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/175671/F5-BIG-IP-TMUI-Directory-Traversal-File-Upload-Code-Execution.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

  • n/a BIG-IP

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.