Sceawere

Vulnerability Detail

CVE-2026-20307UPDATED Verified Sceawere Triage Sources: NVD / CISA KEV

Vulnerability Metadata

Severity
Critical
Score / CVSS
9.9
Creation Date
16h ago
Vendor
Cisco
Product
Cisco Identity Services Engine Software
Attack Type
Deserialization of Untrusted Data
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Complexity
LOW

Narrative and Response

Description

A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have at least low-privileged administrative credentials. This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

Executive Summary

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Technical Details

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Mitigations

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References

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Additional Metadata

{
  "score": "9.9",
  "pubDate": "2026-09-16T17:17:16.973Z",
  "pubdate": "2026-09-16T17:17:16.973Z"
}