CVE-2026-67643

CRITICAL

INFO Priority: 0.10 BB Relevance: 80/100

Published: 2026-09-08 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

AV: Network

AC: Low

PR: None

UI: None

S: Unchanged

C: High

I: High

A: High

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

Vendor	Product	Version
Microsoft	Microsoft SQL Server 2022 (CU 26)	16.0.0.0 < 16.0.4275.2
Microsoft	Microsoft SQL Server 2022 (GDR)	16.0.0 < 16.0.1200.5
Microsoft	Microsoft SQL Server 2025 (CU8)	17.0.0.0 < 17.0.4085.5
Microsoft	Microsoft SQL Server 2025 for x64-based Systems (GDR)	17.0.1050.2 < 17.0.1135.8

vendor-advisory patch

80 / 100

✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

9.8 / 10.0 v3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

0.97%

Raw Score 0.009740

Percentile 62.0%

Date 2026-10-30

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