CVE-2023-40266Network attack vector

Unauthenticated path traversal through WebAssistant

Published Feb 8, 2024 · Updated May 15, 2025

Path traversal in Atos Unify OpenScape Xpressions WebAssistant V7 before V7R1 FR5 HF42 P911 allows remote attackers to traverse filesystem paths. Mitel identifies WebAssistant as the affected component but does not disclose the request parameter, path-processing operation, or reachable files. No authentication or user interaction is required, but network access to the WebAssistant interface is necessary; the individual consequence is undisclosed.

CVSS severity9.8
Critical
EPSS probability0.70%
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 Atos Unify OpenScape Xpressions WebAssistant V7 before V7R1 FR5 HF42 P911 allows remote attackers to traverse filesystem paths. Mitel identifies WebAssistant as the affected component but does not disclose the request parameter, path-processing operation, or reachable files. No authentication or user interaction is required, but network access to the WebAssistant interface is necessary; the individual consequence is undisclosed.

The record

CVE
CVE-2023-40266
Published
Feb 8, 2024
Updated
May 15, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 8, 2024CVE publishedPublication date reported by the CVE source.
  2. May 15, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS: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.

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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