CVE-2026-69789

Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized…

Risk score: 52/100
CVSS: 7.5 v3.1
Exploit chance (30 days): 0.4%
Published: 13 Oct 2026

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What to know

What it is: Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.
Affected: See advisory
Fix: Apply the vendor's security update; see the linked advisory.
Exploitation: No known exploitation

Why it is Yellow

CVSS 7.5 high

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69789

Original description

Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.

Last activity 13 Oct 2026. Patch Forecast updates every hour.