CVE-2020-27994Public exploitNetwork attack vector

Authenticated file disclosure via crafted directory path

Published Feb 3, 2021 · Updated Aug 4, 2024

Path traversal in SolarWinds Serv-U before 15.2.2 allows remote authenticated users to read files outside their home directory. The Web Client's List command accepts a crafted dir value containing backslash parent-directory segments and fails to constrain the resolved path to the user's assigned root. Exploitation requires an account locked to its directory with directory listing enabled, and it exposes readable host files and directory names without reported write access.

CVSS severity6.5
Medium
EPSS probability3.93%
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 SolarWinds Serv-U before 15.2.2 allows remote authenticated users to read files outside their home directory. The Web Client's List command accepts a crafted dir value containing backslash parent-directory segments and fails to constrain the resolved path to the user's assigned root. Exploitation requires an account locked to its directory with directory listing enabled, and it exposes readable host files and directory names without reported write access.

The record

CVE
CVE-2020-27994
Published
Feb 3, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1083, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 3, 2021CVE 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1083File and Directory Discovery
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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