CVE-2023-39043Network attack vector

Unauthenticated forged-message delivery

Published Sep 18, 2023 · Updated Jul 9, 2026

Information disclosure in YKC Tokushima_awayokocho Line 13.6.1 allows remote attackers to obtain a channel access token via unspecified vectors. The public record does not disclose the locus or operation that exposes the token, and the cited technical report is no longer available. No authentication or user interaction is required; possession of the token permits crafted messages to be sent through the affected channel.

CVSS severity6.5
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in YKC Tokushima_awayokocho Line 13.6.1 allows remote attackers to obtain a channel access token via unspecified vectors. The public record does not disclose the locus or operation that exposes the token, and the cited technical report is no longer available. No authentication or user interaction is required; possession of the token permits crafted messages to be sent through the affected channel.

The record

CVE
CVE-2023-39043
Published
Sep 18, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-668, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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?

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

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.

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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-668Exposure of Resource to Wrong Sphere
T1528Steal Application Access Token

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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