CVE-2021-34773 Cisco Unified Communications Products Cross-Site Request Forgery Vulnerability
An attacker can trick users into performing unauthorized actions like modifying configuration or deleting accounts via CSRF in Cisco Unified Communications Manager.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-34773?
CVE-2021-34773 is a medium-severity vulnerability in Cisco Unified Communications Manager, published on 4 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability in the web-based management interface of Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P) could allow an unauthenticated, remote attacker to conduct a cross-site request forgery (CSRF) attack on an affected device. This vulnerability is due to insufficient CSRF protections for the web-based management interface on an affected device. An attacker could exploit this vulnerability by persuading a user of the interface to click a malicious link. A successful exploit could allow the attacker to perform arbitrary actions with the privilege level of the targeted user. These actions could include modifying the device configuration and deleting (but not creating) user accounts.
Weakness: CWE-352
Which versions are affected by CVE-2021-34773?
It affects 2 products.
Products include Cisco Unified Communications Manager, Cisco Unified Communications Manager Im and Presence Service.
How do I fix CVE-2021-34773?
No fix has been published for CVE-2021-34773 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-34773 being exploited?
There is no known exploitation of CVE-2021-34773 in the wild and no public exploit code.
Other vulnerabilities in Cisco Unified Communications Manager
- CVE-2026-20230 Cisco Unified Communications Manager Server-Side Request Forgery (SSRF)
- CVE-2026-20045 Cisco Unified Communications Products Code Injection
- CVE-2025-20309 Cisco Unified Communications Manager Static SSH Credentials Vulnerability
- CVE-2011-1643 Information disclosure in n/a
- CVE-2024-20253 Deserialization in Cisco Packaged Contact Center Enterprise
Sources
Also known as GHSA-rj22-gp23-c66j.