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[UPDATE] [medium] Xen: Vulnerability allows bypassing security measures

mediumCVE-2026-31788
A local attacker from a guest VM can exploit a vulnerability in Xen to bypass security measures.

CSIRTS triage

vendor: Xenproduct: XenAuthentication bypass
What
A vulnerability in Xen allows a local attacker from a guest VM to bypass security measures.
Who is affected
Local attackers with access to a guest VM can exploit this vulnerability.
Urgency
Remediation is medium urgency due to the potential for security measure bypass.
Action
Apply the latest security updates for Xen.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-07-07
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0855

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-31788coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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