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Vulnerabilities

Vulnerability · CVE-2025-20276

A vulnerability in the web-based management interface of Cisco Unified CCX could allow an authenticated, remote attacker to execute arbitrary code on an affected device.

Published Jun 4, 2025 · catalog updated Feb 26, 2026 · Cisco Cisco Unified Contact Center Express

Check this week

CVE-2025-20276 is not in CISA KEV. FIRST estimates a 45.00% chance of exploitation in the next 30 days. Check whether you run Cisco Cisco Unified Contact Center Express.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low3.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
45.00%
Remediation
Advisory link
Affected products
vendor Cisco Cisco Unified Contact Center Express 12.5(1)SU1

A vulnerability in the web-based management interface of Cisco Unified CCX could allow an authenticated, remote attacker to execute arbitrary code on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability by sending a crafted Java object to an affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system of an affected device as a low-privile

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)SU112.5(1)SU1

How to fix CVE-2025-20276

What to do

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

Should you patch?

CVE-2025-20276 is not in CISA KEV. FIRST estimates a 45.00% chance of exploitation in the next 30 days. Check whether you run Cisco Cisco Unified Contact Center Express.

Which versions are affected?

Compare what you have installed with Cisco Cisco Unified Contact Center Express 12.5(1)SU1 12.5(1)SU1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 45.00%. 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. Jun 4, 2025 · EUVD

    Detected

    A vulnerability in the web-based management interface of Cisco Unified CCX could allow an authenticated, remote attacker to execute arbitrary code on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability b

  2. Feb 26, 2026 · EUVD

    Updated

    A vulnerability in the web-based management interface of Cisco Unified CCX could allow an authenticated, remote attacker to execute arbitrary code on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability b

Sources

  • CVE.orgVulnerability recordCVE-2025-20276

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-16887

    A vulnerability in the web-based management interface of Cisco Unified CCX could allow an authenticated, remote attacker to execute arbitrary code on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.