CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-54995: Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability

highCVSS 8.1CVE-2026-54995
Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.

CSIRTS triage

vendor: Microsoftproduct: Reliable Multicast Transport Driver (RMCAST)Remote code execution
What
Use after free in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over a network.
Who is affected
Unauthorized users targeting systems using RMCAST.
Urgency
Remediation is urgent due to the high severity and potential for remote code execution.
Action
Apply the latest security patch for RMCAST.

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

⚡ Watch Reliable Multicast Transport Driver (RMCAST)

Get an email when a new Reliable Multicast Transport Driver (RMCAST) advisory drops — max one per day, one-click unsubscribe.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.1
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54995

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-2026-54995coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Windows Reliable Multicast

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