CVE-2026-34329CWE-122

Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability

High · published May 12, 2026

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

Heap-based buffer overflow in Windows Message Queuing 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-122 · Heap-based Buffer Overflow
Published
2026-05-12T16:58Z
EPSS history
Timeline
  • 12 MAY 16:58Z
    Microsoft Message Queuing (MSMQ) Remote Code Execution Vulnerability
    cvelistv5