SECURITY Signal 77
Cisco discloses critical CVE-2026-76460 zero-day in ISE with perfect CVSS score of 10
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ISE authentication bypass under active attack just days after another Cisco zero-day sent admins scrambling to patch
The recent identification of CVE-2026-76460 as a zero-day vulnerability in Cisco's Identity Services Engine (ISE) poses a severe risk to network security. With a perfect CVSS score of 10.0, the flaw allows unauthenticated remote attackers to gain root access, complicating any remediation efforts. Admins must act quickly to patch affected systems to mitigate the risk of exploitation.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
CVE-2026-76460 allows remote command execution without authentication.
There are no workarounds, and Cisco has advised immediate patching.
The vulnerability affects all configurations of ISE and ISE-PIC.
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Cisco has revealed a critical zero-day vulnerability, CVE-2026-76460, affecting its Identity Services Engine (ISE). This vulnerability allows an unauthenticated remote attacker to execute commands with root privileges, which poses a significant threat to organizations relying on Cisco’s network access control solutions. The flaw's perfect CVSS score indicates its severity.
There are no immediate workarounds available for this vulnerability, meaning that administrators must implement the latest patches to secure their systems. Cisco has provided permanent fixes in specific patches for various ISE versions, and it is crucial for users to ensure they are running supported releases to apply these fixes.
The flaw can be exploited through an API that lacks sufficient authentication controls, allowing attackers to bypass the management interface. As a result, organizations must remain vigilant by reviewing access logs and monitoring network traffic for suspicious activities, as attackers could potentially cover their tracks after breaching systems.
The urgency of addressing this vulnerability is heightened by its recent discovery, which follows another critical vulnerability disclosed just days prior. This situation emphasizes the importance of regular patch management and the need for network administrators to stay informed about potential threats to maintain their systems' security.
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