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HomeCVEsCVE-2021-26411

CVE-2021-26411

Published: January 27, 2026
Last updated:8 hours ago (January 27, 2026)
Exploit: YesZero-day: YesPatch: YesTrend: Neutral
TL;DR
Updated January 27, 2026

CVE-2021-26411 is a high severity vulnerability with a CVSS score of 8.8. Exploits are available; patches have been released and should be applied urgently. This is classified as a zero-day vulnerability.

Key Points
  • 1High severity (CVSS 8.8/10)
  • 2EPSS: 92.00% - very high likelihood of exploitation
  • 3Public exploits are available
  • 4Vendor patches are available
  • 5Strobes Priority Score: 970/1000 (Critical)
  • 6Affects products from: Microsoft
Severity Scores
CVSS v38.8
CVSS v25.1
Priority Score970.0
EPSS Score92.0
High
Exploitation LikelihoodCritical
92.00%EPSS

Very high probability of exploitation in the next 30 days

Immediate patching required
92.00%
EPSS
8.8
CVSS
Yes
Exploit
Yes
Patch
Critical Priority
high EPSS • exploit exists • high priority

EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.

Description

Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.

CVSS v3 Breakdown
Attack Vector:Network
Attack Complexity:Local
Privileges Required:Network
User Interaction:Required
Scope:Changed
Confidentiality:Local
Integrity:High
Availability:Local
Exploit References
Cisa.govGitHub
Patch References
[email protected]Zeroday CZ
Trend Analysis
Neutral
Vulnerable Products
VendorProduct
MicrosoftWindows Server 2008
MicrosoftWindows Server 2016
MicrosoftWindows 10 1607
MicrosoftWindows 10 1507
MicrosoftWindows Server 2012
MicrosoftWindows Rt 8.1
MicrosoftInternet Explorer
MicrosoftWindows Server 2019
MicrosoftEdge
MicrosoftWindows 10 1803

And 6 more...

Advisories
CISA: Microsoft Internet Explorer contains an unspecified vulnerability that allows for memory corruption.
GitHub AdvisoryNVD
Cite This Page
APA Format
Strobes VI. (2026). CVE-2021-26411 - CVE Details and Analysis. Strobes VI. Retrieved January 27, 2026, from https://vi.strobes.co/cve/CVE-2021-26411
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Please cite this page when referencing data from Strobes VI. Proper attribution helps support our vulnerability intelligence research.