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CVE-2025-20124

CRITICAL · CVSS 9.9EPSS 18.5%EU EUVD

A vulnerability in an API of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands as the root user on an affected device. This vulnerability is due to insecure deserialization of user-supplied Java byte streams by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected API. A successful exploit could allow the attacker to execute arbitrary commands on the device and elevate privileges. Note: To successfully exploit this vulnerability, the attacker must have valid read-only administrative credentials. In a single-node deployment, new devices will not be able to authenticate during the reload time.

Key facts

CVSS score
9.9 (v3.1)
Severity
CRITICAL
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H
Weakness (CWE)
CWE-502
EPSS score
18.5% (97th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2025-2152)
Published
February 5, 2025
NVD last modified
June 17, 2026
Status
Analyzed

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2025-2152 in the EU Vulnerability Database. Last updated in EUVD on February 26, 2026.

View on the EU Vulnerability Database

Affected products

  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine

Certified products that may be affected

3 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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