CVE-2026-78439CWE-121

CVE-2026-78439

High · published September 8, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
57.1
In the wild
Unconfirmed
What it is

Stack-based buffer overflow in Microsoft Graphics Component 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
0.00837 · 57.1th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-09-08T22:20Z
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78439 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 1%
    epss
  • 08 SEP 17:13Z
    Microsoft Office Graphics Component Remote Code Execution Vulnerability
    cvelistv5