Is CVE-2021-35247 actively exploited?

CVE-2021-35247 has no public evidence of in-the-wild exploitation as of 2025-10-27.

What is the CVSS score for CVE-2021-35247?

CVE-2021-35247 has a CVSS score of 4.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

How do I patch CVE-2021-35247?

Patch guidance is available from solarwinds security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-35247.

CVE-2021-35247 - remediation guidance & executive summary

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: none
Weaknesses: CWE-20 · Improper Input ValidationNVD-CWE-noinfo

Metadata

Primary Vendor: SOLARWINDS
Published: 1/10/2022
Last Modified: 10/27/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-35247

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary