by Kastro
Paper/Archive/CVE-2026-9177

CVE-2026-9177

Axway SecureTransport — Server-Side Template Injection in SecureTransport's Apache Velocity mail templates

EPSS 0.5%CVSS 9.4
critical.is priorityof 100
37
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 42.9.429 × 208.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
SecureTransport5.5-20260326 – < 5.5-202605285.5-20260528CNA

Scores by source

Toreon (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

patchsupport.axway.com/news/4882/lang/enwriteuptoreon.com/CVE-2026-9177writeupdocs.hackjiji.org/blog/cve-2026-9177-ssti-in-securetransport-mft-gateway