CVE-2026-54982CWE-191

Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability

High · published July 14, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
44.3
In the wild
Unconfirmed
What it is

Integer underflow (wrap or wraparound) in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00535 · 44.3th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2026-07-14T17:04Z
EPSS history
Timeline
  • 14 JUL 17:04Z
    Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulnerability
    cvelistv5