CVE-2026-100721

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 ImpacttotalSuccessful exploitation gives total 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

0.59% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 47.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

Deferred. NVD last modified this record on 2026-09-28.

Red Hat severity

Critical. Red Hat's rating for its own products, not a CVSS rating.

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

2026-09-27 01:28Z1 MO AGO

Last updated

2026-09-28 16:51Z1 MO AGO

Reserved

2026-09-26

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

Critical (CVSS 9.5)

CNA CVSS vector

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

Weaknesses

• CWE-863Incorrect AuthorizationClass

Data version

5.2

Document digest

a43423ac54c884a036ba6a0044d12ea995de230dde333fa3f4b0c5811895e800

• github.comGitHub Security Advisory (GHSA-5h3f-q97h-ccvc)https://github.com/patriksimek/vm2/security/advisories/GHSA-5h3f-q97h-ccvcvendor-advisory
• github.comPatch Commithttps://github.com/patriksimek/vm2/commit/6ac3916da84e060c403e407b6b6318fcc66b0e72patch
• github.comPatch Commithttps://github.com/patriksimek/vm2/commit/ab4ee7d803e8c80155e9eb3672226bddbca4aa9cpatch
• github.comPatch Commithttps://github.com/patriksimek/vm2/commit/91034466bfb7f56b95fd48083ec6ca36d058f164patch
• www.vulncheck.comVulnCheck Advisory: vm2 before 3.12.2 Authorization Bypass via Custom Resolverhttps://www.vulncheck.com/advisories/vm2-before-3.12.2-authorization-bypass-via-custom-resolverthird-party-advisory