CVE-2026-78456CWE-122

CVE-2026-78456

High · published September 8, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
59.7
In the wild
Unconfirmed
What it is

Heap-based buffer overflow in SQL Server allows an authorized 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:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00913 · 59.7th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-09-08T22:20Z
Affected products (2)
ProductVersionsFixed in
microsoft/sql_server_2022< 16.0.1200.516.0.1200.5
microsoft/sql_server_2022≥ 16.0.4003.1, < 16.0.4275.216.0.4275.2
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78456 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:18Z
    EPSS moved — → 1%
    epss
  • 08 SEP 17:18Z
    SQL Server Remote Code Execution Vulnerability
    cvelistv5