Vulnerability Monitor

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CVE-2026-21513

Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a security feature over a network.

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 confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 13 products from microsoft, from microsoft, from microsoft and 10 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2026, 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

2026-02-10T18:16:33.643

Last Modified

2026-02-11T15:38:13.670

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

Weaknesses

Type: Secondary
CWE-693

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	microsoft	windows_10_1607	< 10.0.14393.8868	Yes
Operating System	microsoft	windows_10_1607	< 10.0.14393.8868	Yes
Operating System	microsoft	windows_10_1809	< 10.0.17763.8389	Yes
Operating System	microsoft	windows_10_1809	< 10.0.17763.8389	Yes
Operating System	microsoft	windows_10_21h2	< 10.0.19044.6937	Yes
Operating System	microsoft	windows_10_21h2	< 10.0.19044.6937	Yes
Operating System	microsoft	windows_10_21h2	< 10.0.19044.6937	Yes
Operating System	microsoft	windows_10_22h2	< 10.0.19045.6937	Yes
Operating System	microsoft	windows_10_22h2	< 10.0.19045.6937	Yes
Operating System	microsoft	windows_10_22h2	< 10.0.19045.6937	Yes
Operating System	microsoft	windows_11_23h2	< 10.0.22631.6649	Yes
Operating System	microsoft	windows_11_23h2	< 10.0.22631.6649	Yes
Operating System	microsoft	windows_11_24h2	< 10.0.26100.7781	Yes
Operating System	microsoft	windows_11_24h2	< 10.0.26100.7781	Yes
Operating System	microsoft	windows_11_25h2	< 10.0.26200.7781	Yes
Operating System	microsoft	windows_11_25h2	< 10.0.26200.7781	Yes
Operating System	microsoft	windows_server_2012	-	Yes
Operating System	microsoft	windows_server_2012	r2	Yes
Operating System	microsoft	windows_server_2016	< 10.0.14393.8868	Yes
Operating System	microsoft	windows_server_2019	< 10.0.17763.8389	Yes
Operating System	microsoft	windows_server_2022	< 10.0.20348.4711	Yes
Operating System	microsoft	windows_server_2022_23h2	< 10.0.25398.2149	Yes
Operating System	microsoft	windows_server_2025	< 10.0.26100.32313	Yes

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21513 Vendor Advisory ([email protected])
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21513 US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)

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.