{"id":"CVE-2021-23155","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-23155","generatedAt":"2026-10-28T01:52:05.500Z","title":"Improper validation of the cloud certificate chain in Mobile Client allows man-in-the-middle attack to impersonate the legitimate Command Centre Server.","description":"Improper validation of the cloud certificate chain in Mobile Client allows man-in-the-middle attack to impersonate the legitimate Command Centre Server. This issue affects: Gallagher Command Centre Mobile Client for Android 8.60 versions prior to 8.60.065; version 8.50 and prior versions.","published":"2021-11-18T18:15:08.000Z","lastModified":"2026-06-17T03:38:21.000Z","status":"Modified","sourceIdentifier":"disclosures@gallagher.com","cvss":{"version":"3.1","score":6.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N"},"cwe":["CWE-296","CWE-295"],"affected":["gallagher/command centre mobile client"],"epss":{"score":0.00482,"percentile":0.41261,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.48%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://security.gallagher.com/Security-Advisories/CVE-2021-23155","tags":["Vendor Advisory"],"source":"disclosures@gallagher.com"},{"url":"https://security.gallagher.com/Security-Advisories/CVE-2021-23155","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-23155","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."}