CVE-2025-36236Network attack vector

Unauthenticated arbitrary file write via path traversal

Published Nov 13, 2025 · Updated Nov 13, 2025

Path traversal in IBM AIX 7.2 and 7.3 and IBM VIOS 3.1 and 4.1 nimesis allows remote attackers to write arbitrary files. The service uses a pathname supplied through a crafted URL request for a file write outside the intended directory; IBM has not identified the affected request handler or validation error. Network connectivity to an enabled NIM server is required; no authentication or user interaction is needed, and successful exploitation alters files and can interrupt service.

CVSS severity8.2
High
EPSS probability0.49%
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 AIX 7.2 and 7.3 and IBM VIOS 3.1 and 4.1 nimesis allows remote attackers to write arbitrary files. The service uses a pathname supplied through a crafted URL request for a file write outside the intended directory; IBM has not identified the affected request handler or validation error. Network connectivity to an enabled NIM server is required; no authentication or user interaction is needed, and successful exploitation alters files and can interrupt service.

The record

CVE
CVE-2025-36236
Published
Nov 13, 2025
Updated
Nov 13, 2025
Vendor
IBM
Product
AIX
Classifications
CWE-22, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 13, 2025Record 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=7.2
  2. Affected versionversion=7.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · AIXversion=7.2; version=7.3
IBM · PowerVM Virtual I/O Serverversion=3.1; version=4.1

Published CVSS scores

8.2IBMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
9.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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')
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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