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CVE-2026-6985

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CVE-2026-6985

Published: Apr 25, 2026

Modified: Apr 27, 2026

PUBLISHED

CVSS v3.1

5.3

MEDIUM

Description

A weakness has been identified in Cesanta Mongoose up to 7.20. This vulnerability affects the function handle_opt of the file /src/net_builtin.c of the component TCP Option Handler. This manipulation of the argument optlen causes infinite loop. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 7.21 is able to resolve this issue. Upgrading the affected component is advised. 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-835
CWE-404

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

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