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CVE-2021-27085

Published: Mar 11, 2021Updated: Oct 30, 2025 Sources: CVE List NVD BDUNVD-CWE-noinfo
NVD MITRE
8.8CVSSHIGH
EPSS Score
3.7%
Top 11.7%
CISA KEV
Active Exploitation
Since Nov 3, 2021
Exploits
No Known Exploits
Remediation
Patch Available

Description

Internet Explorer Remote Code Execution Vulnerability

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:HIntegrity
High
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

NVD-CWE-noinfo

Affected Products

Internet Explorer 11Microsoft
On-premDesktop App
Consumer Software / browser
internet explorermicrosoft
On-premDesktop App
Consumer Software / browser
Internet ExplorerMicrosoft Corp
Desktop App
Consumer Software / browser
microsoftcommercialUSOperating Systems
microsoft corpcommercialUSOperating Systemsaka microsoft corporation

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Nov 3, 2021
Remediation due:Nov 17, 2021

Required action: Apply updates per vendor instructions.

Official Patch Available

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085
portal.msrc.microsoft.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085
cisa.gov
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085
msrc.microsoft.com
and 2 more references View all →

Timeline

Published
Mar 11, 2021
Added to CISA KEV
Nov 3, 2021
Last Updated
Oct 30, 2025

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