CVE-2023-45858Network attack vector

Unauthenticated local file disclosure via path traversal

Published Sep 14, 2026 · Updated Sep 14, 2026

Path traversal in the PRTG Webserver before 23.4.88.1429 allows remote attackers to read local files without authentication. Paessler has not disclosed which request handler accepts traversal sequences or how its path validation fails. A network-reachable PRTG web interface is sufficient; the stated impact is local-file disclosure, with no reported write or execution capability.

CVSS severityUnavailable
Unscored
EPSS probability0.66%
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 the PRTG Webserver before 23.4.88.1429 allows remote attackers to read local files without authentication. Paessler has not disclosed which request handler accepts traversal sequences or how its path validation fails. A network-reachable PRTG web interface is sufficient; the stated impact is local-file disclosure, with no reported write or execution capability.

The record

CVE
CVE-2023-45858
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Paessler
Product
PRTG Network Monitor
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <23.4.88.1429

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Paessler · PRTG Network Monitorversion=0 <23.4.88.1429

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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