CVE-2026-6986
Last modified
CVE-2026-6986 is a low-severity vulnerability rated 2.9/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cesanta | Mongoose | >= 7.0, < 7.21 |
References
- https://github.com/dwBruijn/CVEs/blob/main/Mongoose/AESGCM.mdExploit, Third Party Advisory
- https://vuldb.com/submit/796231Third Party Advisory, VDB Entry
- https://vuldb.com/vuln/359529Third Party Advisory, VDB Entry
- https://vuldb.com/vuln/359529/ctiPermissions Required, VDB Entry
Timeline
- Published
- Last Modified
- Status
- Analyzed
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