Skip to content
Cisco Patches Critical Zero-Day in Unified Communications and Webex Calling

Cisco Patches Critical Zero-Day in Unified Communications and Webex Calling

First seen 23 Jan 2026, 22:10 UTC • •

Article Content

Browse articles
ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Cisco has addressed a critical zero-day remote code execution vulnerability (CVE-2026-20045) in its Unified Communications and Webex Calling platforms. This flaw, which has a CVSS score of 8.2, is actively exploited by unauthenticated remote attackers to execute arbitrary commands. Users of these services are advised to apply the patch promptly.

Start a free Starter trial for enhanced analysis

Ask AI about this cluster

Updated 217d ago How this analysis works

More articles in this cluster (2)

Following this threat?

Track Cisco and CVE-2026-20045 in your own feed — you're alerted when they show up in new reporting, leak sites or exploitation.

Free account · no card needed