CVE-2020-17383Public exploitNetwork attack vector

Root filesystem disclosure via document-directory traversal

Published Jan 24, 2022 · Updated Aug 4, 2024

Path traversal in Telos Alliance Z/IP One firmware through 4.0.0r allows remote attackers to read arbitrary device files. The SOhttpServer document-directory handler accepts traversal sequences without constraining the resolved path, while the service runs as root. Unauthenticated network access to the built-in web server exposes configuration, password hashes, and the cleartext WebUI management password.

CVSS severity9.8
Critical
EPSS probability4.25%
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 Telos Alliance Z/IP One firmware through 4.0.0r allows remote attackers to read arbitrary device files. The SOhttpServer document-directory handler accepts traversal sequences without constraining the resolved path, while the service runs as root. Unauthenticated network access to the built-in web server exposes configuration, password hashes, and the cleartext WebUI management password.

The record

CVE
CVE-2020-17383
Published
Jan 24, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1552.001, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record 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

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1552.001Credentials In Files
T1005Data from Local System

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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