CVE-2026-6985

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.56% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 44.6% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-25 16:15Z4 MO AGO

Last updated

2026-04-27 12:35Z4 MO AGO

Reserved

2026-04-24

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.9)

CNA CVSS vector

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

Weaknesses

• CWE-404Improper Resource Shutdown or ReleaseClass
• CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')Base

Data version

5.2

Document digest

e7009c90b26936ff97eb191d6741f91848d3d74e13201c57e53748b9d0402aca

• vuldb.comVDB-359528 | Cesanta Mongoose TCP Option net_builtin.c handle_opt infinite loophttps://vuldb.com/vuln/359528vdb-entrytechnical-description
• vuldb.comVDB-359528 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/359528/ctisignaturepermissions-required
• vuldb.comSubmit #796230 | Cesanta Mongoose 7.20 Denial of Servicehttps://vuldb.com/submit/796230third-party-advisory
• github.comhttps://github.com/dwBruijn/CVEs/blob/main/Mongoose/TCP_opt_dos.mdexploit
• github.comhttps://github.com/cesanta/mongoose/releases/tag/7.21patch