CVE-2026-20172
A vulnerability in the Lite Agent feature of Cisco Enterprise Chat and Email (ECE) could allow an authenticated, remote attacker to conduct browser-based attacks. To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Agent . This vulnerability is due to inadequate validation of file contents during file upload operations. An attacker could exploit this vulnerability by uploading a file that contains malicious scripts or HTML code, which the application could make available to other users to access. A successful exploit could allow the attacker to execute the contents of that file in the browser of a user and conduct browser-based attacks. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ece-lite-agent-BCgSN8eb Security Impact Rating: Medium CVE: CVE-2026-20172
CSIRTS triage
- What
- A vulnerability in the Lite Agent feature could allow an authenticated attacker to conduct browser-based attacks.
- Who is affected
- Authenticated users of Cisco Enterprise Chat and Email are affected.
- Urgency
- Remediation is necessary to prevent potential browser-based attacks.
- Action
- Update to the latest version of Cisco Enterprise Chat and Email.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Advisory coverage (1)
- mediumCisco Enterprise Chat and Email Lite Agent File Upload Vulnerabilitycisco-psirt · 2026-05-06
External references
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