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Vulnerabilities

Vulnerability · CVE-2025-20354

A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an unauthenticated, remote attacker to upload arbitrary files and execute arbitr

Published Nov 5, 2025 · catalog updated Feb 26, 2026 · Cisco Cisco Unified Contact Center Express

Last checked Oct 24, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-20354. EPSS is 0.87%. Act only if a listed version of Cisco Cisco Unified Contact Center Express is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.87%
Remediation
Advisory link
Affected products
vendor Cisco Cisco Unified Contact Center Express 12.5(1)_SU02_ES01

A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an unauthenticated, remote attacker to upload arbitrary files and execute arbitrary commands with root permissions on an affected system. This vulnerability is due to improper authentication mechanisms that are associated to specific Cisco Unified CCX features. An attacker could exploit this vulnerability by uploading a crafted file to an affected system through the Java RMI process. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system an

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Cisco Cisco Unified Contact Center Express 12.5(1)_SU02_ES0112.5(1)_SU02_ES01

How to fix CVE-2025-20354

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-20354. EPSS is 0.87%. Act only if a listed version of Cisco Cisco Unified Contact Center Express is installed.

Which versions are affected?

Compare what you have installed with Cisco Cisco Unified Contact Center Express 12.5(1)_SU02_ES01 12.5(1)_SU02_ES01. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.87%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Cisco security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 5, 2025 · EUVD

    Detected

    A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an unauthenticated, remote attacker to upload arbitrary files and execute arbitrary commands with root permissions on an affected system. This vulnerability is due to improper authentication mechanisms that are associated to specific Cisco Unified CCX features. An attacker could exploit this vulnera

  2. Feb 26, 2026 · EUVD

    Updated

    A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an unauthenticated, remote attacker to upload arbitrary files and execute arbitrary commands with root permissions on an affected system. This vulnerability is due to improper authentication mechanisms that are associated to specific Cisco Unified CCX features. An attacker could exploit this vulnera

Sources

  • CVE.orgVulnerability recordCVE-2025-20354

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-20354

    30-day exploitation probability 0.87%

    first.org
  • EUVDVulnerability recordEUVD-2025-37892

    A vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified CCX could allow an unauthenticated, remote attacker to upload arbitrary files and execute arbitrary commands with root permissions on an affected system. This vulnerability is due to improper auth

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 24, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 24, 2026
  • FIRST EPSSOct 24, 2026
  • EUVDOct 24, 2026