CVE-2026-9177Public exploitNetwork attack vector

Admin code execution via unsandboxed mail templates

Published Jul 29, 2026 · Updated Jul 29, 2026

Server-side template injection in Axway SecureTransport before 5.5-20260528 allows remote authenticated users to execute arbitrary server code. The mail-template uploader passes administrator-supplied XHTML to Apache Velocity without sandboxing, allowing expressions to reach Java classes and Runtime.exec. Administrative access and a notification that renders the uploaded template are required; successful execution grants control of the host.

CVSS severity9.4
Critical
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side template injection in Axway SecureTransport before 5.5-20260528 allows remote authenticated users to execute arbitrary server code. The mail-template uploader passes administrator-supplied XHTML to Apache Velocity without sandboxing, allowing expressions to reach Java classes and Runtime.exec. Administrative access and a notification that renders the uploaded template are required; successful execution grants control of the host.

The record

CVE
CVE-2026-9177
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
Axway
Product
SecureTransport
Classifications
CWE-1336, CAPEC-242, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.5-20260326 <5.5-20260528

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Axway · SecureTransportversion=5.5-20260326 <5.5-20260528

Published CVSS scores

9.4ToreonCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CAPEC-242Code Injection
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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