PT-2021-4815 · Microsoft · Virtual Machine Bus+1

Wei · Published 2021-11-09 · Updated 2023-12-28 · CVE-2021-26443

Positive Technologies (AI Summary)

CVSS v3.1

9.0

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Virtual Machine Bus (VMBus) (affected versions not specified)

Description The issue is related to incorrect code generation management in the Microsoft Virtual Machine Bus (VMBus) component of the Windows operating system. This allows a remote attacker to execute arbitrary code.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

BDU:2021-05543

CVE-2021-26443

Affected Products

Virtual Machine Bus

Windows

References · 11

• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26443 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26443 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26443 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-26443 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26443 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05543 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-26443 · Security Note
• https://t.me/true_secator/2302 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021110932 · Note
• https://t.me/isacarusec/4647 · Telegram Post
• https://t.me/cvenotify/65442 · Telegram Post