CVE-2025-20354
CVE-2025-20354 is a critical-severity vulnerability in Cisco Unified Contact Center Express with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 1% (55th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-37892
- Weakness: CWE-434
- Affected product: Cisco Unified Contact Center Express
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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 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.
- How severe is CVE-2025-20354?
- CVE-2025-20354 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-20354 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-20354?
- CVE-2025-20354 primarily affects Cisco Unified Contact Center Express. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-20354?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2025-20354 have an EU (EUVD) identifier?
- Yes. CVE-2025-20354 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37892.
- When was CVE-2025-20354 published?
- CVE-2025-20354 was published on 2025-11-05 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:a:cisco:unified_contact_center_express:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_contact_center_express:15.0:*:*:*:*:*:*:*
More vulnerabilities in Cisco Unified Contact Center Express
- CVE-2021-44228 — Critical (CVSS 10.0): Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in…
- CVE-2024-20253 — Critical (CVSS 9.9): A vulnerability in multiple Cisco Unified Communications and Contact Center Solutions products could allow an…
- CVE-2020-3280 — Critical (CVSS 9.8): A vulnerability in the Java Remote Management Interface of Cisco Unified Contact Center Express (Unified CCX) could…
- CVE-2018-0403 — Critical (CVSS 9.8): Multiple vulnerabilities in the web-based management interface of Cisco Unified Contact Center Express (Unified CCX)…
- CVE-2017-12337 — Critical (CVSS 9.8): A vulnerability in the upgrade mechanism of Cisco collaboration products based on the Cisco Voice Operating System…
- CVE-2022-20658 — Critical (CVSS 9.6): A vulnerability in the web-based management interface of Cisco Unified Contact Center Management Portal (Unified CCMP)…
All CVEs affecting Cisco Unified Contact Center Express →
Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities
- CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
- CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
- CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
- CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
- CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
- CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…
Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →