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CVE-2026-20190 is a high-severity information disclosure vulnerability affecting Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC). The flaw is caused by improper authorization checks when a resource is accessed, allowing an unauthenticated remote attacker to send crafted traffic to an affected device and retrieve sensitive information that should not be exposed. Reported exposed data includes hashed credentials, indicating that access control around protected resources is insufficiently enforced.
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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.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability affecting Cisco Identity Services Engine highlighted in the July patch roundup as a notable security update.
A Cisco Identity Services Engine information disclosure vulnerability affecting Cisco Identity Services Engine.
A high-severity information disclosure vulnerability in Cisco Identity Services Engine products caused by improper authorization checks, allowing unauthenticated attackers to access sensitive information including hashed credentials.
A high-severity information disclosure vulnerability in Cisco ISE/ISE-PIC caused by improper authorization checks, allowing unauthenticated attackers to access sensitive information including hashed credentials.
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.