Windows DNS Server Remote Code Execution Vulnerability

published 2023-03-14 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-27500

cvss: 7.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

Patch / fix

fixed in 7 links 1

Microsoft Windows Server 2019 10.0.17763.4131
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.4131
Microsoft Windows Server 2022 10.0.20348.1607
Microsoft Windows Server 2016 10.0.14393.5786
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.5786
Microsoft Windows Server 2012 R2 6.3.9600.20865
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.20865

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-23400 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-07-18)

Exploit prediction

1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows Server 2019
Microsoft Windows Server 2019 (Server Core installation)
Microsoft Windows Server 2022
Microsoft Windows Server 2016
Microsoft Windows Server 2016 (Server Core installation)
Microsoft Windows Server 2012 R2
Microsoft Windows Server 2012 R2 (Server Core installation)

Classification

Weakness

CWE-122 Heap-based Buffer Overflow

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2023-23400
vendor-advisory, patch

Sources

CVE List CVE-2023-23400
NVD CVE-2023-23400

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary