Dashboard / CVE-2026-6985

CVE-2026-6985

MEDIUM
MEDIUM Priority: 0.03 BB Relevance: 71/100
Published: 2026-04-25 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: X
AT: None
VC: None
VI: None
VA: Low

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.

Weakness Classification (2)

Affected Software (1)

VendorProductVersion
cesanta mongoose 7.0 – 7.21

References & Advisories (5)

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

Bug Bounty Relevance

71 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

5.5 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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

EPSS — Exploitation Probability

0.56%
Raw Score 0.005650
Percentile 46.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00565
2026-10-28
0.00565

Intelligence Sources

nvd ref →

External Links