PT-2021-3045 · Microsoft · Skype For Business+1

Suresh Chelladurai · Published 2021-05-11 · Updated 2023-08-02 · CVE-2021-26421

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

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

Description The issue is related to errors in the representation of information by the user interface of the corporate communication server. It may allow a remote attacker to perform a spoofing attack by exploiting the vulnerability.

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

UI Misrepresentation of Critical Information

Weakness Enumeration

CWE-451

Related Identifiers

BDU:2021-02651

CVE-2021-26421

Affected Products

Lync

Skype For Business

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2021-26421 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26421 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-02651 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26421 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26421 · Vendor Advisory
• https://t.me/cvenotify/14600 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021051122 · Note