CVE-2026-15435Network attack vector

Unauthenticated arbitrary file write via dot-dot traversal

Published Jul 30, 2026 · Updated Jul 30, 2026

Path traversal in IBM App Connect Enterprise 12.0.1.0 through 12.0.12.27 and 13.0.1.0 through 13.0.7.2 allows remote attackers to write files. The URL-processing locus accepts /../ sequences and uses the attacker-selected traversal path for a filesystem write; IBM has not named the handler. No authentication or user interaction is required, and IBM reports that arbitrary files on the system can be written.

CVSS severity9.8
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in IBM App Connect Enterprise 12.0.1.0 through 12.0.12.27 and 13.0.1.0 through 13.0.7.2 allows remote attackers to write files. The URL-processing locus accepts /../ sequences and uses the attacker-selected traversal path for a filesystem write; IBM has not named the handler. No authentication or user interaction is required, and IBM reports that arbitrary files on the system can be written.

The record

CVE
CVE-2026-15435
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
IBM
Product
App Connect Enterprise
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 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=12.0.1.0 <=12.0.12.27
  2. Affected versionversion=13.0.1.0 <=13.0.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · App Connect Enterpriseversion=12.0.1.0 <=12.0.12.27; version=13.0.1.0 <=13.0.7.2

Published CVSS scores

9.8IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

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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