CVE-2026-20045

CVE

Threat entity extracted from intelligence sources

Frequency

occurrences

First Seen

January 21, 2026

Last Seen

July 2, 2026

API

Exploited in Wild

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Ransomware Use

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Public Exploits

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Attack Vector

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Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

CISA Alerts on Exploited Cisco Unified CM Zero-Day Vulnerability CVE-2026-2004591.0

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent alert regarding the active exploitation of a zero-day remote code execution vulnerability in Cisco Unified Communications products, tracked as CVE-2026-20045. This flaw allows attackers to execute arbitrary code an...

Cisco Patches Critical Zero-Day in Unified Communications and Webex Calling90.3

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 se...

Critical Zero-Day Vulnerability CVE-2026-20182 Exploited in Cisco SD-WAN Systems87.2

Cisco has disclosed a critical authentication bypass vulnerability, CVE-2026-20182, affecting its Catalyst SD-WAN Controller and Manager. This flaw allows unauthenticated remote attackers to bypass authentication and gain administrative privileges, enabling manipulation of network configurations. Th...

Cisco Issues Warning for Critical Zero-Day Vulnerability in Unified Communications84.1

Cisco has disclosed a critical zero-day remote code execution vulnerability, CVE-2026-20045, affecting multiple Unified Communications products. This flaw allows unauthenticated attackers to execute arbitrary commands on the underlying operating system, potentially gaining root access. The Cisco Pro...