CVE-2021-31958: microsoft windows_10 Authentication Bypass by Capture-replay
CVSS: 7.5v3.1HighModified
Published 08-06-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-31958 is a high (CVSS 7.5) Authentication Bypass by Capture-replay vulnerability in microsoft windows_10. EPSS estimates a 2.56% chance of exploitation in the next 30 days, higher than 84.9% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
2.56%
0%100%
Low · -0.10 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 08-06-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Windows NTLM Elevation of Privilege Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · NVD (NIST)
AV:N/AC:M/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.56%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
-0.10 pp
From 2.66% on 21-09-2026
21-09-202621-10-2026
EPSS score2.56%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft28 products
- windows_10na | 20h2 | 21h1 | 1607 | 1809 | 1909 | 2004
- windows 10 version 1507≥ 10.0.0, < 10.0.10240.18967
- windows 10 version 1607≥ 10.0.0, < 10.0.14393.4467
- windows 10 version 1809≥ 10.0.0, < 10.0.17763.1999
- windows 10 version 1909≥ 10.0.0, < 10.0.18363.1621
1 vendor · 28 products
References
1 links
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31958X Refsource MISCPatchVendor Advisory