Is It On KEV?

Microsoft Enhanced Cryptographic Provider

YES - ON THE CISA KEV LIST
CVE-2021-31199

Microsoft Enhanced Cryptographic Provider Privilege Escalation Vulnerability

CISA catalog due date2021-11-17
overdue since 2021-11-17
EPSS exploit probability (next 30 days)3.0% · 87percentile
From CVE publication to KEV listing148 days (2021-06-08 → 2021-11-03)
Remediation window (KEV listing to due date)14 days
Days on the KEV list1834 days
Date added to KEV2021-11-03
Known ransomware campaign useUnknown
VendorMicrosoft
ProductEnhanced Cryptographic Provider
Weaknesses (CWE)n/a

Microsoft: 391 entries (22.0% of all KEV entries are from this vendor); 41 added in 2026.

BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.

Your BOD 26-04 window (SSVC tier helper)

Your remediation window ends:

Description

Microsoft Enhanced Cryptographic Provider contains an unspecified vulnerability that allows for privilege escalation.

Required action (CISA)

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-31199

References

Other KEV entries for this vendor: Microsoft

Microsoft - Vendors with KEV entries

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