CVE-2026-2967

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.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• 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

0.57% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 47.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:H/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

2026-02-23 02:32Z8 MO AGO

Last updated

2026-02-23 13:32Z8 MO AGO

Reserved

2026-02-22

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-940Improper Verification of Source of a Communication ChannelBase

Data version

5.2

Document digest

02e3f20268aead55bd392c1801662552f7b63f619006660b8bbf7aa7e4c5e80c

• vuldb.comVDB-347334 | Cesanta Mongoose TCP Sequence Number net_builtin.c getpeer verification of sourcehttps://vuldb.com/?id.347334vdb-entrytechnical-description
• vuldb.comVDB-347334 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/?ctiid.347334signaturepermissions-required
• vuldb.comSubmit #755450 | Cesanta Mongoose Embedded Web Server 7.20 Improper Validation of Specified Index, Position, or Offset in Ihttps://vuldb.com/?submit.755450third-party-advisory
• github.comhttps://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.mdrelated
• github.comhttps://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md#pocexploit