CVE-2026-67643CWE-122

CVE-2026-67643

Critical · published September 8, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
61.7
In the wild
Unconfirmed
What it is

Heap-based buffer overflow in SQL Server allows an unauthorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00974 · 61.7th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-09-08T22:18Z
Affected products (4)
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
microsoft/sql_server_2025< 17.0.1135.817.0.1135.8
microsoft/sql_server_2025≥ 17.0.4006.2, < 17.0.4085.517.0.4085.5
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67643 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:17Z
    EPSS moved — → 1%
    epss
  • 08 SEP 17:13Z
    Microsoft SQL Server Remote Code Execution Vulnerability
    cvelistv5