#VU26523 Reliance on Untrusted Inputs in a Security Decision in Zoom Workplace Desktop App for Windows

Vulnerability identifier: #VU26523

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-807

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zoom Workplace Desktop App for Windows
Client/Desktop applications / Office applications

Vendor: Zoom Video Communications, Inc.

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to Zoom client for Windows automatically processes comments in chat and converts URLs with UNC path into links. A remote attacker can trick the victim into following this link and gain access to NTLM credentials, sent by the victim's system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Zoom Workplace Desktop App for Windows: 0.9.10042.0911 - 4.6.8 19178.0323

---

External links
https://www.bleepingcomputer.com/news/security/zoom-client-leaks-windows-login-credentials-to-attackers/
https://support.zoom.us/hc/en-us/articles/201361953-New-Updates-for-Windows

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.