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UK Cyber Defence
VulnerabilityAwaiting Analysis

CVE-2026-83945

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

MEDIUM 6.6EPSS 0.56%

Does this matter?

Lower severity and a low EPSS score (0.56%). Track it; it rarely justifies an emergency change on its own.

Description

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

CVSS 3.1
6.6 MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
0.56% probability · 46th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-122
Source
secure@microsoft.com
EPSS trend
0%3%5%14 October 2026: 0.42%26 October 2026: 0.56%14 October 202626 October 2026

EPSS moved from 0.4% on 14 October 2026 to 0.6% on 26 October 2026.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.