A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This issue affects the function mg_aes_gcm_decrypt of the file /src/tls_aes128.c of the component GCM Authentication Tag Handler. Such manipulation leads to improper verification of cryptographic signature. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is assessed as difficult. The exploit has been disclosed publicly and may be used. Upgrading to version 7.21 is capable of addressing this issue. It is advisable to upgrade the affected component. VulDB has contacted the vendor early and they confirmed quickly, that this issue got fixed already.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 1
- First seenCVSS 2.9 · cesantaNVD modified 2026-10-26 21:10
Affected (CPE criteria) 1
cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*
References 5
- https://github.com/cesanta/mongoose/releases/tag/7.21 Release Notes
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/AESGCM.md Exploit, Third Party Advisory
- https://vuldb.com/submit/796231 Third Party Advisory, VDB Entry
- https://vuldb.com/vuln/359529 Third Party Advisory, VDB Entry
- https://vuldb.com/vuln/359529/cti Permissions Required, VDB Entry