{"id":"CVE-2025-55293","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-55293","generatedAt":"2026-10-28T00:18:09.555Z","title":"Prior to v2.6.3, an attacker can send NodeInfo with a empty publicKey first, then overwrite it with a new key.","description":"Meshtastic is an open source mesh networking solution. Prior to v2.6.3, an attacker can send NodeInfo with a empty publicKey first, then overwrite it with a new key. First sending a empty key bypasses 'if (p.public_key.size > 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info->user.public_key.size > 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.","published":"2025-08-18T18:15:40.000Z","lastModified":"2026-06-17T09:41:36.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","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-287"],"affected":["meshtastic/meshtastic firmware"],"epss":{"score":0.00456,"percentile":0.39304,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/meshtastic/firmware/commit/cf7f0f9d0895602df3453a4f5cfea843f4e09744","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/meshtastic/firmware/pull/6372","tags":["Issue Tracking","Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/meshtastic/firmware/security/advisories/GHSA-95pq-gj5v-4fg2","tags":["Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-55293","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."}