CVE-2021-35251Network attack vector

Installation-detail disclosure via verbose technical errors

Published Mar 9, 2022 · Updated Sep 16, 2024

Information disclosure in SolarWinds Web Help Desk before 12.7.8 allows remote attackers to read installation details via error messages. SolarWinds has not published the request, code locus, or error-handling operation that causes detailed technical errors to expose environmental data. No authentication or user interaction is required, and the reported consequence is limited to disclosure of installation-environment details.

CVSS severity5.3
Medium
EPSS probability0.95%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in SolarWinds Web Help Desk before 12.7.8 allows remote attackers to read installation details via error messages. SolarWinds has not published the request, code locus, or error-handling operation that causes detailed technical errors to expose environmental data. No authentication or user interaction is required, and the reported consequence is limited to disclosure of installation-environment details.

The record

CVE
CVE-2021-35251
Published
Mar 9, 2022
Updated
Sep 16, 2024
Vendor
SolarWinds
Product
Web Help Desk
Classifications
CWE-209, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 9, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

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

  1. Affected versionversion=12.7.7 HF 1 and Previous Versions <12.7.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SolarWinds · Web Help Deskversion=12.7.7 HF 1 and Previous Versions <12.7.8

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3SolarWindsCVSS: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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-209Generation of Error Message Containing Sensitive Information
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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