Internet Explorer Memory Corruption Vulnerability
CVE-2021-26411

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Internet Explorer 9
Internet Explorer 11
Microsoft Edge (edgehtml-based)
Vendor
CVE Published:
11 March 2021

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC🟣 EPSS 89%🦅 CISA Reported

What is CVE-2021-26411?

Internet Explorer Memory Corruption Vulnerability

CISA has reported CVE-2021-26411

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-26411 as being exploited and is known by the CISA as enabling ransomware campaigns.

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

Internet Explorer 11 Windows 10 Version 1803 for 32-bit Systems 1.0.0

Internet Explorer 9 Windows Server 2008 for 32-bit Systems Service Pack 2 1.0.0

Microsoft Edge (EdgeHTML-based) Windows 10 Version 1803 for 32-bit Systems 1.0..0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-26411
Created by CrackerCat

References

https://portal.msrc.microsoft.com/en-US/security-guidance...
x_refsource_MISC

EPSS Score

89% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • 🟡

    Public PoC available

  • 💰

    Used in Ransomware

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.