What is CVE-2026-115740?

CVE-2026-115740 is a medium-severity vulnerability in Trellix Dlp On-Prem Extensions, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-11-05.

How severe is CVE-2026-115740?

Medium severity. CVSS v3 base score is 4.3 out of 10.

SSRF in Trellix Dlp On-Prem Extensions

CVE-2026-115740

Server side request forgery vulnerability exists in the DLP on-prem extensions version 11.13.1 and earlier allows the file Prefix parameter in the OpenEventEvidenceFile.do endpoint accepts arbitrary UNC paths without validation. The server-side code attempts to open the specified file path, causing Windows to resolve the hostname and initiate SMB authentication to the attacker-controlled host.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-11-05 · last modified 2026-11-05.

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:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.7th percentile), scored 2026-11-09.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Trellix Dlp On-Prem Extensions — versions 11.13.1 and earlier

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

support.trellix.com/s/article/000015949

Frequently asked questions

What is CVE-2026-115740?: CVE-2026-115740 is a medium-severity vulnerability in Trellix Dlp On-Prem Extensions, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-11-05.
How severe is CVE-2026-115740?: Medium severity. CVSS v3 base score is 4.3 out of 10.