CVE-2026-70343CWE-122

CVE-2026-70343

High · published October 13, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
56.4
In the wild
Unconfirmed
What it is

Heap-based buffer overflow in Microsoft MPEG-2 Video Extension allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00805 · 56.4th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-10-13T23:19Z
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70343 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:33Z
    EPSS moved — → 1%
    epss
  • 13 OCT 19:01Z
    Microsoft MPEG-2 Video Extension Remote Code Execution Vulnerability
    cvelistv5
  • 13 OCT 19:01Z
    Microsoft MPEG-2 Video Extension Remote Code Execution Vulnerability
    cvelistv5