CVE-2025-57403Public exploitNetwork attack vector

Unauthenticated file read via DNS TXT query

Published Dec 26, 2025 · Updated Dec 26, 2025

Path traversal in Cola Dnslog 1.3.2 allows remote attackers to read local files through crafted DNS TXT record queries. In src/logserver/dnslog.py, the TXT handler passes the lowercased query name to os.path.join with the temporary directory, then opens the resulting path without enforcing that it remains beneath that directory. Unauthenticated network access to the authoritative DNS service is sufficient, and exposed file contents are returned in TXT answers without reported write or code-execution capability.

CVSS severity7.5
High
EPSS probability1.06%
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 Cola Dnslog 1.3.2 allows remote attackers to read local files through crafted DNS TXT record queries. In src/logserver/dnslog.py, the TXT handler passes the lowercased query name to os.path.join with the temporary directory, then opens the resulting path without enforcing that it remains beneath that directory. Unauthenticated network access to the authoritative DNS service is sufficient, and exposed file contents are returned in TXT answers without reported write or code-execution capability.

The record

CVE
CVE-2025-57403
Published
Dec 26, 2025
Updated
Dec 26, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-23, T1005, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 26, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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-23Relative Path Traversal
T1005Data from Local System
T1190Exploit Public-Facing Application

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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