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CVE-2026-20305 is an operating-system command-injection vulnerability in the diagnostic tools of Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC). Improper validation of user-supplied input allows a remote attacker with valid administrative credentials to submit crafted commands through the web-based management interface, execute arbitrary code on the underlying operating system, and elevate privileges to root. In single-node ISE deployments, exploitation can make the node unavailable and disrupt network access for endpoints that have not already authenticated.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Cisco Identity Services Engine command-injection vulnerability (CWE-78). It is remotely reachable with low attack complexity but requires high privileges; successful exploitation can affect confidentiality, integrity, and availability, including across a security scope change.
An authenticated remote command-injection vulnerability in the diagnostic tools of Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC). An attacker with valid administrative credentials can submit crafted commands through the web-based management interface to execute arbitrary code as root. Exploitation in a single-node deployment can render the ISE node unavailable, preventing unauthenticated endpoints from accessing the network until restoration.
An authenticated remote command-injection vulnerability in the diagnostic tools of Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC). An administrator can send crafted commands through the web-based management interface to execute arbitrary code as root. In single-node ISE deployments, exploitation can also render the node unavailable and prevent unauthenticated endpoints from accessing the network.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.