Cisco Unified CCX Java RMI Unauthenticated Root RCE
CVE-2025-20354 is a critical vulnerability in the Java Remote Method Invocation (RMI) process of Cisco Unified Contact Center Express (Unified CCX). The flaw is caused by improper authentication associated with specific Unified CCX features, where certain RMI endpoints fail to enforce authentication. An unauthenticated remote attacker can send crafted RMI requests, typically to the exposed RMI service on TCP port 1099, to invoke file upload functionality and upload an arbitrary crafted file to the target system. Successful exploitation allows subsequent execution of arbitrary commands on the underlying operating system with root privileges.
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Impact, mitigation & remediation
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Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
31 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Critical unauthenticated remote vulnerability in Cisco Unified Contact Center Express (Unified CCX) Java RMI process that allows arbitrary file upload and arbitrary command execution, resulting in root-level code execution on the underlying OS.
A critical remote code execution and privilege escalation vulnerability in Cisco Unified Contact Center Express (CCX) due to improper authentication in the Java RMI process, allowing unauthenticated attackers to upload files and execute commands as root.
A critical unauthenticated remote code execution vulnerability in Cisco UCCX’s Java RMI process that allows crafted file upload leading to arbitrary command execution with root privileges.
A critical Cisco Unified Contact Center Express (Unified CCX) Java RMI flaw enabling unauthenticated arbitrary file upload and arbitrary command execution with root privileges.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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