Medium severity · published Oct 13, 2026
CVE-2026-94520
Microsoft SQL Server Denial of Service Vulnerability
4.9
CVSS
0.8%
EPSS
No
On KEV
Description
Use of externally-controlled format string in SQL Server allows an authorized attacker to deny service over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MS
Microsoft SQL Server 2017 (GDR) · Microsoft
14.0.0 before 14.0.2140.2 · source: vendor
MS
Microsoft SQL Server 2017 for x64-based Systems (CU31) · Microsoft
14.0.3006.16 before 14.0.3560.2 · source: vendor
MS
Microsoft SQL Server 2019 (GDR) · Microsoft
15.0.0 before 15.0.2200.2 · source: vendor
MS
Microsoft SQL Server 2019 for x64-based Systems (CU32) · Microsoft
15.0.4003.23 before 15.0.4500.2 · source: vendor
MS
Microsoft SQL Server 2022 (GDR) · Microsoft
16.0.0 before 16.0.1210.3 · source: vendor
MS
Microsoft SQL Server 2022 for x64-based Systems (CU27) · Microsoft
16.0.4003.1 before 16.0.4305.5 · source: vendor
MS
Microsoft SQL Server 2025 for x64-based Systems (CU9) · Microsoft
17.0.4006.2 before 17.0.5015.4 · source: vendor
MS
Microsoft SQL Server 2025 for x64-based Systems (GDR) · Microsoft
17.0.1050.2 before 17.0.1145.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-94520
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-94520
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-94520
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