CVE-2026-20034 Cisco Unity Connection Remote Code Execution Vulnerability
Authenticated attackers can execute arbitrary code as root via crafted API requests in Cisco Unity Connection, leading to full device compromise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-20034?
CVE-2026-20034 is a high-severity code injection vulnerability in Cisco Unity Connection, published on 6 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in the web-based management interface of Cisco Unity Connection could allow an authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of a targeted device. To exploit this vulnerability, the attacker must have valid user credentials on the affected device.
Weakness: CWE-35
Which versions are affected by CVE-2026-20034?
It affects 1 product.
Products include Cisco Unity Connection.
How do I fix CVE-2026-20034?
No fix has been published for CVE-2026-20034 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-20034 being exploited?
There is no known exploitation of CVE-2026-20034 in the wild and no public exploit code.
Other vulnerabilities in Cisco Unity Connection
Sources
Also known as GHSA-wfvp-xw34-rhwq.