{"id":"CVE-2018-5504","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-5504","generatedAt":"2026-10-29T01:48:36.725Z","title":"In some circumstances, the Traffic Management Microkernel (TMM) does not properly handle certain malformed Websockets requests/responses, which allows remote attackers to cause a denial-of-service (DoS) or possible remote code execution on the F5 BIG-IP…","description":"In some circumstances, the Traffic Management Microkernel (TMM) does not properly handle certain malformed Websockets requests/responses, which allows remote attackers to cause a denial-of-service (DoS) or possible remote code execution on the F5 BIG-IP system running versions 13.0.0 - 13.1.0.3 or 12.1.0 - 12.1.3.1.","published":"2018-03-22T18:29:01.000Z","lastModified":"2026-06-17T02:00:26.000Z","status":"Modified","sourceIdentifier":"f5sirt@f5.com","cvss":{"version":"3.0","score":8.1,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":["f5/big-ip access policy manager","f5/big-ip advanced firewall manager","f5/big-ip analytics","f5/big-ip application acceleration manager","f5/big-ip application security manager","f5/big-ip domain name system","f5/big-ip edge gateway","f5/big-ip global traffic manager","f5/big-ip link controller","f5/big-ip local traffic manager","f5/big-ip policy enforcement manager","f5/big-ip webaccelerator","f5/big-ip websafe"],"epss":{"score":0.04292,"percentile":0.91074,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securitytracker.com/id/1040558","tags":["Third Party Advisory","VDB Entry"],"source":"f5sirt@f5.com"},{"url":"https://support.f5.com/csp/article/K11718033","tags":["Vendor Advisory"],"source":"f5sirt@f5.com"},{"url":"http://www.securitytracker.com/id/1040558","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.f5.com/csp/article/K11718033","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-5504","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}