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CVE-2026-65681: Windows iSCSI Target Service Denial of Service Vulnerability

highCVSS 7.5CVE-2026-65681
Null pointer dereference in Windows iSCSI Target Service allows an unauthorized attacker to deny service over a network.

CSIRTS triage

vendor: Microsoftproduct: Windows iSCSI Target ServiceDenial of service
What
A null pointer dereference in Windows iSCSI Target Service allows denial of service over the network.
Who is affected
Systems running Windows iSCSI Target Service exposed to network access are affected.
Urgency
Moderate urgency; CVSS 7.5 high severity DoS that does not require authentication but requires network access.
Action
Apply the latest Windows security update addressing CVE-2026-65681.

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

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.5
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65681

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-2026-65681coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Windows iSCSI Target

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center