{"id":"CVE-2025-55293","aliases":["EUVD-2025-25140","GHSA-95pq-gj5v-4fg2"],"status":"published","title":"Meshtastic allows crafting of specific NodeInfo packets that overwrite any publicKey saved in the NodeDB","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 \u003e 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info-\u003euser.public_key.size \u003e 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.","severity":{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00484,"percentile":0.41954,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2025-08-18T17:24:35Z","modified":"2026-10-28T10:59:56Z","products":[{"vendor":"meshtastic","product":"firmware"},{"vendor":"meshtastic","product":"meshtastic_firmware"},{"vendor":"yarbo","product":"firmware"}],"references":[{"url":"https://github.com/meshtastic/firmware/security/advisories/GHSA-95pq-gj5v-4fg2","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory"]},{"url":"https://github.com/meshtastic/firmware/pull/6372","tags":["x_refsource_MISC","Issue Tracking","Patch","fix"]},{"url":"https://github.com/meshtastic/firmware/commit/cf7f0f9d0895602df3453a4f5cfea843f4e09744","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/55xxx/CVE-2025-55293.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-55293","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-55293","title":"Meshtastic allows crafting of specific NodeInfo packets that overwrite any publicKey saved in the NodeDB","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 \u003e 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info-\u003euser.public_key.size \u003e 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.","status":"published","published":"2025-08-18T17:24:35.254Z","modified":"2025-08-18T17:41:25.082Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"critical","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:32:52.839698Z"}],"euvd":[{"id":"EUVD-2025-25140","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 \u003e 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info-\u003euser.public_key.size \u003e 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.","status":"published","published":"2025-08-18T17:24:35Z","modified":"2025-08-18T17:41:25Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"critical"}],"updated_at":"2026-11-02T20:31:56.298799Z"}],"nvd":[{"id":"CVE-2025-55293","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 \u003e 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info-\u003euser.public_key.size \u003e 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.","status":"published","published":"2025-08-18T18:15:39.59Z","modified":"2026-06-17T09:41:35.917Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:11:24.730342Z"}],"osv":[{"id":"CVE-2025-55293","title":"Meshtastic allows crafting of specific NodeInfo packets that overwrite any publicKey saved in the NodeDB","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 \u003e 0) {', clearing the existing publicKey (and resetting the size to 0) for a known node. Then a new key bypasses 'if (info-\u003euser.public_key.size \u003e 0) {', and this malicious key is stored in NodeDB. This vulnerability is fixed in 2.6.3.","status":"published","published":"2025-08-18T17:24:35.254Z","modified":"2026-10-28T10:59:56.617738084Z","cvss":[{"version":"3.1","score":9.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","level":"critical"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:44:50.863921Z"}]}}