Vulnerability in Cisco Enterprise Chat And Email
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.001 (2.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Cisco Enterprise Chat And Email — versions 11.6(1)_ES3, 11.6(1)_ES4, 12.0(1)_ES6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20172?
- CVE-2026-20172 is a medium-severity vulnerability in Cisco Enterprise Chat And Email, classified under CWE-646. CVSS score: 4.3/10. Published 2026-05-06.
- How severe is CVE-2026-20172?
- Medium severity. CVSS v3 base score is 4.3 out of 10.