EUVD-2026-81100
GHSA-g4h9-vg33-43r2
Severity by source
AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Network-reachable, low-complexity abuse gated behind high-privilege authentication (PR:H); vendor-asserted cross-sphere resource transfer with scope change (S:C) and full C/I/A impact accepted as stated.
Primary rating from Vendor (cisco).
CVSS VectorNVD
Lifecycle Timeline
2DescriptionNVD
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC), engineering teams have conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20194 are related to incorrect resource transfer between spheres that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-669.
AnalysisAI
Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) contain multiple internally discovered vulnerabilities grouped under CVE-2026-20194, stemming from incorrect resource transfer between spheres (CWE-669). An authenticated attacker with high privileges can exploit these over the network to potentially achieve high confidentiality, integrity, and availability impact, as reflected by the CVSS 3.1 score of 9.1 (Critical) with scope change. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated, high-privilege identity on Cisco ISE or ISE-PIC (PR:H) reachable over the network (AV:N); there is no user interaction and low attack complexity once that access is held. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 3.1 base 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H) rates this Critical, but the real-world priority is more nuanced than the headline number. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Cisco hardening release referenced in advisory cisco-sa-hardening-ise-XU5EwX5T (https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-ise-XU5EwX5T); exact fixed versions are not specified in the available data, so consult the advisory for version-specific upgrade instructions. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Cisco ISE and ISE-PIC deployments and record exact software versions against the vendor advisory, restrict management-plane access to dedicated trusted administrative subnets, and enforce multi-factor authentication for every privileged ISE account. …
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External POC / Exploit Code
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