CVE-2023-7223Public exploitNetwork attack vector

Unauthenticated syslog disclosure via topicurl selector

Published Jan 9, 2024 · Updated Jun 17, 2025

Improper access control in TOTOLINK T6 4.1.9cu.5241_B20210923 allows remote attackers to read system logs without authentication. The /cgi-bin/cstecgi.cgi handler accepts showSyslog as the attacker-controlled topicurl value and returns protected syslog content without enforcing access control. No credentials or user interaction are required, and the grounded impact is limited to disclosure of log data.

CVSS severity5.3
Medium
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in TOTOLINK T6 4.1.9cu.5241_B20210923 allows remote attackers to read system logs without authentication. The /cgi-bin/cstecgi.cgi handler accepts showSyslog as the attacker-controlled topicurl value and returns protected syslog content without enforcing access control. No credentials or user interaction are required, and the grounded impact is limited to disclosure of log data.

The record

CVE
CVE-2023-7223
Published
Jan 9, 2024
Updated
Jun 17, 2025
Vendor
TOTOLINK
Product
T6
Classifications
CWE-284
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 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=4.1.9cu.5241_B20210923

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOTOLINK · T6version=4.1.9cu.5241_B20210923

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
5.0VulDBAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

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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