{"id":"CVE-2023-27100","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-27100","generatedAt":"2026-10-25T15:18:54.153Z","title":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.","description":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.","published":"2023-03-22T23:15:12.000Z","lastModified":"2026-06-17T05:44:22.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-307"],"affected":["netgate/pfsense plus","pfsense/pfsense"],"epss":{"score":0.09844,"percentile":0.95564,"date":"2026-10-24","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2023-04-08","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":51352,"kind":"exploit","title":"pfsenseCE v2.6.0 - Anti-brute force protection bypass","url":"https://www.exploit-db.com/exploits/51352","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/hardware/remote/51352.py","file":"exploits/hardware/remote/51352.py","published":"2023-04-08","added":"2023-04-08","updated":"2023-04-28","author":"FabDotNET","type":"remote","platform":"hardware","port":null,"verified":false,"codes":["CVE-2023-27100"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"A public exploit is published in Exploit-DB and the impact is critical, while EPSS rates exploitation at 9.8%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html","source":"cve@mitre.org"},{"url":"https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://redmine.pfsense.org/issues/13574","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://redmine.pfsense.org/issues/13574","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://packetstorm.news/files/id/171791","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-27100","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."}