Vulnerability Monitor

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CVE-2021-26411

Internet Explorer Memory Corruption Vulnerability

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, integrity (unauthorized modifications), and limited availability for affected systems. Impacting 16 products from microsoft, from microsoft, from microsoft and 13 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-03-11T16:15:13.863

Last Modified

2025-10-30T19:56:10.210

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:H/Au:N/C:P/I:P/A:P

  • Access Vector: NETWORK
  • Access Complexity: HIGH
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

4.9

Impact Score

6.4

Weaknesses
  • Type: Primary
    CWE-416
  • Type: Secondary
    CWE-416
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application microsoft edge - Yes
Operating System microsoft windows_10_1507 - No
Operating System microsoft windows_10_1607 - No
Operating System microsoft windows_10_1803 - No
Operating System microsoft windows_10_1809 - No
Operating System microsoft windows_10_1909 - No
Operating System microsoft windows_10_2004 - No
Operating System microsoft windows_10_20h2 - No
Operating System microsoft windows_server_2016 - No
Operating System microsoft windows_server_2019 - No
Application microsoft internet_explorer 11 Yes
Operating System microsoft windows_10_1507 - No
Operating System microsoft windows_10_1607 - No
Operating System microsoft windows_10_1803 - No
Operating System microsoft windows_10_1809 - No
Operating System microsoft windows_10_1909 - No
Operating System microsoft windows_10_2004 - No
Operating System microsoft windows_10_20h2 - No
Operating System microsoft windows_7 - No
Operating System microsoft windows_8.1 - No
Operating System microsoft windows_rt_8.1 - No
Operating System microsoft windows_server_2008 r2 No
Operating System microsoft windows_server_2012 - No
Operating System microsoft windows_server_2012 r2 No
Operating System microsoft windows_server_2016 - No
Operating System microsoft windows_server_2019 - No
Application microsoft internet_explorer 9 Yes
Operating System microsoft windows_server_2008 - No
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For microsoft's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.