critical Known exploitedREV. 01
CVE-2020-5902F5 BIG-IP TMUI — Unauthenticated Remote Code Execution
The configuration utility of F5's traffic managers (BIG-IP Traffic Management User Interface) exposes undisclosed pages that let an unauthenticated attacker read and upload files and run commands on the device fronting the application estate.
Read the risk
THE VITAL STATS- CVSS score
- 9.8/ 10 CVSS v3.1
- EPSS probability
- 100% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2020-07-01
- Added to KEV
- 2021-11-03
- Exploit published
- Yes
- Confidence
- high
- Kill chain
- initial access
- MITRE ATT&CK
- T1190
- Severity
- critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attacker needsNetwork access to the management interface of an affected BIG-IP version (11.6.1-11.6.5.1 through 15.0.0-15.1.0.3). No credentials needed.
Behind the card
4 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02Vendor advisoryF5 security article K52145254support.f5.com
- 03WriteupPositive Technologies: how the flaw worksswarm.ptsecurity.com
- 04CISACISA Known Exploited Vulnerabilities entrycisa.gov
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| title, summary, cvss, severity, exploitation.attack_complexity, exploitation.prerequisites, exploitation.exploit_available, references | nvd.nist.gov | 2026-08-07 | claude-code | high |
| exploitation.known_exploited, remediation.patch_available | cisa.gov | 2026-08-07 | claude-code | high |
| epss | api.first.org | 2026-08-07 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.