CVE-2026-20803

Name: CVE-2026-20803
Creator: NVD / NIST
Published: 2026-01-13T18:16:06.63+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 1.24%

Last modified Jun 17, 2026

CVE-2026-20803 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.. EPSS estimates a 1.24% chance of exploitation in the next 30 days.

Description

Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.

Metrics

CVSS 3.1

7.2/10

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

EPSS Probability

1.24%

65.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Microsoft	Sql Server 2022	>= 16.0.1000.6, < 16.0.1165.1
Microsoft	Sql Server 2022	>= 16.0.4003.1, < 16.0.4230.2
Microsoft	Sql Server 2025	17.0.1000.7

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803Vendor Advisory

Timeline

Published: Jan 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20803?

Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.

How severe is CVE-2026-20803?

CVE-2026-20803 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.24% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20803?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20803?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST