CVE-2021-35247

4.3 MEDIUM CISA KEV - Actively Exploited
Published: January 10, 2022 Modified: October 27, 2025

Description

Serv-U web login screen to LDAP authentication was allowing characters that were not sufficiently sanitized. SolarWinds has updated the input mechanism to perform additional validation and sanitization. Please Note: No downstream affect has been detected as the LDAP servers ignored improper characters. To insure proper input validation is completed in all environments. SolarWinds recommends scheduling an update to the latest version of Serv-U.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35247
Source: psirt@solarwinds.com
Broken Link Vendor Advisory
https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35247
Source: af854a3a-2127-422b-91ae-364da2661108
Broken Link Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-35247
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

5 reference(s) from NVD

Quick Stats

CVSS v3 Score
4.3 / 10.0
EPSS (Exploit Probability)
2.9%
86th percentile
Exploitation Status
Actively Exploited
Remediation due: 2022-02-04

Weaknesses (CWE)

Affected Vendors

solarwinds