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CVE

CVE-2021-31201

Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability

Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability.

MEDIUM · CVSS 5.2 ⚠ CISA KEV EPSS 0.00671
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
Sigma rules10 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

◆

Threat Actors Linked

1
actorDSIRF (Knotweed)
▤

Affected Products & Versions

16
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 7all versions
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Sigma Hunt Rules

10
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
relatedcriticalAntivirus Password Dumper Detection
relatedcriticalHacktool Execution - Imphash
relatedcriticalHackTool - Rubeus Execution
relatedcriticalPotential Credential Dumping Via LSASS Process Clone
relatedcriticalWCE wceaux.dll Access
relatedcriticalHackTool - Dumpert Process Dumper Default File
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Scoring & Timeline

5.2
MEDIUM · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Jun 2021 · 11:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
cisaKEV-CVE-2021-31201
msrcCVE-2021-31201Elevation of Privilege
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31201PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31201US Government Resource
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