CVE-2023-21820
Published: 14 February 2023
Summary
CVE-2023-21820 is a high-severity Buffer Over-read (CWE-126) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 7.4 (High).
Operationally, ranked in the top 9.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
Windows Distributed File System (DFS) contains a remote code execution vulnerability tracked as CVE-2023-21820. The flaw affects the Windows DFS component and carries a CVSS 3.1 base score of 7.4 with the vector AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H, along with the weakness classification CWE-126.
An attacker positioned on an adjacent network who possesses low privileges and can induce limited user interaction may exploit the issue to execute arbitrary code, resulting in high impact to confidentiality, integrity, and availability on the affected system.
Microsoft’s Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21820 supplies official mitigation guidance and patch information for the vulnerability.
The associated EPSS score remains flat at 0.0616 with no material increase observed after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-25986
Vulnerability details
Windows Distributed File System (DFS) Remote Code Execution Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.