🛡️ CVE-2026-6985
🟡 CVSS 5.3 — Medium ⚠️ Exploit Public CWE-404 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE CWE-404
Public Exploit ⚠️ Yes
Source NVD
Published 2026-04-25
Updated 2026-06-02
Modified 2026-04-29
Fix URL N/A

Affected Packages

Software From version Fixed in
mongoose 7.0 7.21

References

Third Party Advisory, VDB Entry https://vuldb.com/submit/796230
Third Party Advisory, VDB Entry https://vuldb.com/vuln/359528
Permissions Required, VDB Entry https://vuldb.com/vuln/359528/cti

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