Cyber Resilience

CVE-2021-31201

Microsoft Windows Server 2008 r2

CISA KEVActive ExploitationEUVD Exploited
Published
08 June 2021
Modified
30 October 2025
KEV Added
03 November 2021
Patch / advisory
CVSS Score v3.1 5.2
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
EPSS Score 0.026 84th percentile
Risk Priority 75 floored blend · peak EPSS

Summary

CVE-2021-31201 is a medium-severity an unspecified weakness vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 5.2 (Medium).

Operationally, ranked in the top 16% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

Microsoft Enhanced Cryptographic Provider contains an elevation of privilege vulnerability tracked as CVE-2021-31201. The flaw affects the cryptographic provider component in Microsoft Windows environments and carries a CVSS 3.1 score of 5.2 with a vector indicating local attack vector, low attack complexity, low privileges required, no user interaction, changed scope, and limited impacts to confidentiality and integrity.

A local attacker with low privileges can exploit the issue to obtain elevated rights on the affected system, resulting in partial disclosure or modification of information outside the original security scope. The vulnerability requires no user interaction and can be triggered through standard local access.

Microsoft has published guidance for the issue in its security advisory, and the vulnerability appears in the CISA catalog of known exploited vulnerabilities, confirming observed in-the-wild exploitation.

EU & UK References

Vulnerability Data

Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability

CWE(s)
KEV Date Added
03 November 2021

Related Threats

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Affected Assets

microsoft
windows 10 1507
≤ 10.0.10240.18967
microsoft
windows 10 1607
≤ 10.0.14393.4467
microsoft
windows 10 1809
≤ 10.0.17763.1999
microsoft
windows 10 1909
≤ 10.0.18363.1621
microsoft
windows 10 2004
≤ 10.0.19041.1052
microsoft
windows 10 20h2
≤ 10.0.19042.1052
microsoft
windows 10 21h1
≤ 10.0.19043.1052
microsoft
windows 7
all versions
microsoft
windows 8.1
all versions
microsoft
windows rt 8.1
all versions
+6 more product configuration(s) — see NVD for full list

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References