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CVE-2025-20354

Cisco Unified Contact Center Express unrestricted file upload

9.8 CRITICALEPSS 0.87%
  1. Published5 Nov 2025

Description

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 and elevate privileges to root.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Cisco Unified Contact Center Express< 12.5\(1\)_su03_es07 · 15.0

Remediation

Fixed in
Cisco Unified Contact Center Express≥ 12.5\(1\)_su03_es07

References

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Frequently asked

Is CVE-2025-20354 being actively exploited?

CVE-2025-20354 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.87%.

How severe is CVE-2025-20354?

CVE-2025-20354 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.87% probability of exploitation.

Which products are affected by CVE-2025-20354?

Affected products include Cisco Unified Contact Center Express.

How do I fix CVE-2025-20354?

Upgrade affected software to a fixed version, for example Cisco Unified Contact Center Express 12.5\(1\)_su03_es07 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-20354 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.