By The Hacker News
Publication Date: 2026-01-22 04:06:00
Cisco has released fresh patches to address what it described as a “critical” security vulnerability impacting multiple Unified Communications (CM) products and Webex Calling Dedicated Instance that it has been actively exploited as a zero-day in the wild.
The vulnerability, CVE-2026-20045 (CVSS score: 8.2), could permit an unauthenticated remote attacker to execute arbitrary commands on the underlying operating system of a susceptible device.
“This vulnerability is due to improper validation of user-supplied input in HTTP requests,” Cisco said in an advisory. “An attacker could exploit this vulnerability by sending a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root.”
The critical rating for the flaw is due to the fact that its…
