Medium severity4.3CISA KEVNVD Advisory· Published Jan 10, 2022· Updated Jun 17, 2026
CVE-2021-35247
CVE-2021-35247
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:solarwinds:serv-u:*:*:*:*:*:*:*:*range: <15.3
- (no CPE)
- (no CPE)range: 15.2.5 and previous versions
Patches
Vulnerability mechanics
References
3- documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3_release_notes.htmnvdRelease NotesVendor Advisory
- www.solarwinds.com/trust-center/security-advisories/cve-2021-35247nvdBroken LinkVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
News mentions
1- CISA: Patch actively exploited SolarWinds Serv-U DoS vulnerability (CVE-2026-28318)Help Net Security · Jun 8, 2026