CVE-2026-65829Network attack vector

Arbitrary file write via unneutralized project pathnames

Published Sep 22, 2026 · Updated Sep 22, 2026

Path traversal in MPXJ 7.3.0 through 16.4.1 allows attackers to write files outside intended directories through crafted PRX or STX files. The Primavera P3 PRX and SureTrak STX readers use pathnames from untrusted project files without neutralizing elements that escape the intended directory. Exploitation requires an application to process an attacker-supplied PRX or STX file, and writes remain limited by the hosting process's filesystem permissions.

CVSS severity5.3
Medium
EPSS probability0.34%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in MPXJ 7.3.0 through 16.4.1 allows attackers to write files outside intended directories through crafted PRX or STX files. The Primavera P3 PRX and SureTrak STX readers use pathnames from untrusted project files without neutralizing elements that escape the intended directory. Exploitation requires an application to process an attacker-supplied PRX or STX file, and writes remain limited by the hosting process's filesystem permissions.

The record

CVE
CVE-2026-65829
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Jon Iles
Product
MPXJ
Classifications
CWE-22, CAPEC-126, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 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=>= 7.3.0, < 16.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Jon Iles · MPXJversion=>= 7.3.0, < 16.5.0

Published CVSS scores

5.3Jon Iles / GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CAPEC-126Path Traversal
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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