PT-2026-65816 · Axway · Securetransport

CVE-2026-9177 · Published 2026-07-29 · Updated 2026-07-29

NVD

CVSS v4.0

9.4

Critical

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

A Server-Side Template Injection (SSTI) vulnerability was identified in the mail template functionality of the Axway SecureTransport product in version 5.5-20260326. This flaw allows an attacker with admin privileges to inject arbitrary Java code expressions, which are executed server-side when the template is rendered (i.e., during email sending). Successful exploitation of this flaw allows an attacker to execute arbitrary code on the server that results in full host compromise.

This issue affects all Axway SecureTransport versions prior 5.5-20260528 update.

Fix

Weakness Enumeration

CWE-1336

Related Identifiers

CVE-2026-9177

Affected Products

Securetransport

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-9177 · Security Note
• https://support.axway.com/news/4882/lang/en · Vendor Advisory
• https://docs.hackjiji.org/blog/cve-2026-9177-ssti-in-securetransport-mft-gateway · Note
• https://toreon.com/CVE-2026-9177 · Note