CVE-2025-20375VulnerabilityPublished 5 Nov 2025Updated 26 Feb 2026

CVE-2025-20375: Cisco Unified Contact Center Express · Unrestricted File Upload

Affects Cisco Unified Contact Center ExpressSource CVE Database V5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 26 Oct 2026, 06:26 UTC

CVSS 3.1 base score

6.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 5 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Cisco Cisco Unified Contact Center Express	Affected =10.6 =11.6 =12.0 =10.5 =12.5	Fixed in–

AI-suggested

To mitigate CVE-2025-20375, organizations should immediately verify and restrict administrative access to the Cisco UCCX web UI, enforcing strong authentication mechanisms such as multi-factor authentication (MFA) to reduce the risk of credential compromise. Network segmentation should be applied to limit access to the management interface only to trusted administrators. Monitoring and logging of administrative activities should be enhanced to detect any anomalous file upload attempts. Organizations should apply any available patches or updates from Cisco as soon as they are released. In the absence of patches, consider disabling or restricting file upload functionality in the web UI if feasible. Conduct regular audits of user accounts and permissions to ensure least privilege principles are enforced. Additionally, implement endpoint protection and intrusion detection systems to identify and block suspicious activities related to file execution on the UCCX servers. Finally, maintain up-to-date backups and incident response plans to quickly recover from potential compromises.

Description

A vulnerability in the web UI of Cisco Unified CCX could allow an authenticated, remote attacker to upload and execute arbitrary files. This vulnerability is due to an insufficient input validation associated to specific UI features. An attacker could exploit this vulnerability by uploading a crafted file to the web UI. A successful exploit could allow the attacker to upload arbitrary files to a vulnerable system and execute them, gaining access to the underlying operating system. To exploit this vulnerability, the attacker must have valid administrative credentials.

Impact

The impact of CVE-2025-20375 is significant for organizations using Cisco Unified Contact Center Express, as it allows an attacker with administrative access to execute arbitrary code on the underlying operating system. This can lead to full system compromise, including unauthorized access to sensitive customer data, disruption of contact center operations, and potential lateral movement within the corporate network. The confidentiality and integrity of the system are severely affected, although availability impact is not directly indicated. Given that contact centers often handle sensitive personal and financial information, exploitation could result in data breaches, regulatory penalties, and reputational damage. The requirement for administrative credentials limits the attack surface but does not eliminate risk, especially in environments where credential theft or insider threats are possible. The vulnerability could also be leveraged as a foothold for further attacks against enterprise infrastructure. Organizations with large-scale deployments of Cisco UCCX, especially in finance, healthcare, and government sectors, face heightened risk due to the critical nature of their services and data.

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cc-mult-vuln-gK4TFXSn (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Feb 2026, 00:26 UTC

Technical details

References

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