AUGUST 4, 2026
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Case File

CVE-2021-35247

MEDIUM · CVSS 4.3 EPSS 3.45% CISA KEV · Actively Exploited

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2022-01-10 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.3. It is listed in CISA's Known Exploited Vulnerabilities catalog, indicating confirmed active exploitation in the wild.

CISA KEV Details

Status: This CVE is listed in CISA's Known Exploited Vulnerabilities catalog.

Ransomware use: Unknown

Added to KEV: 2022-01-21

Required action: Apply updates per vendor instructions.

CVE
CVE-2021-35247
Severity
MEDIUM
CVSS
4.3
EPSS
3.45%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)