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CVE-2026-6986

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CVE-2026-6986

Published: Apr 25, 2026

Modified: Apr 27, 2026

PUBLISHED

CVSS v3.1

3.7

LOW

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.

VendorProductVersions

Cesanta

Mongoose

affected
7.0
affected
7.1
affected
7.2
affected
7.3
affected
7.4

+17 more versions

Weaknesses (CWE)

CWE-347
CWE-345

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

References

VDB-359529 | CTI Indicators (IOB, IOC, IOA)
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