PT-2021-3044 · Microsoft · Skype For Business+3

Published 2021-05-11 · Updated 2023-08-02 · CVE-2021-26422

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Skype for Business and Lync (affected versions not specified)

Description The issue is related to incorrect code generation management in the Skype for Business Server (Microsoft Lync Server), which can be exploited by 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:2021-02650

CVE-2021-26422

Affected Products

Lync

Lync Server

Skype For Business

Skype For Business Server

References · 6

• https://osv.dev/vulnerability/CVE-2021-26422 · Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26422 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26422 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26422 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-02650 · Security Note
• https://cybersecurity-help.cz/vdb/SB2021051122 · Note