What is the CVSS score of CVE-2021-28465?

CVE-2021-28465 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 3.7%.

Is there a patch available for CVE-2021-28465?

Yes, a patch is available for CVE-2021-28465. Update the affected software to the latest version immediately.

Web Media Extensions CVE-2021-28465

HIGH

Out-of-bounds Write (CWE-787)

2021-05-11 secure@microsoft.com

Buffer Overflow RCE Memory Corruption Web Media Extensions

7.8

CVSS 3.1 · Vendor: microsoft

Severity by source

Vendor (microsoft) PRIMARY

7.8 HIGH

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

May 11, 2021 - 19:15 cve.org

HIGH 7.8

DescriptionCVE.org

Web Media Extensions Remote Code Execution Vulnerability

AnalysisAI

Web Media Extensions Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This Out-of-bounds Write vulnerability could allow attackers to write data beyond allocated buffer boundaries leading to code execution or crashes.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. Affected products include: Microsoft Web Media Extensions.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).