{"cve":{"cve_id":"CVE-2021-35247","is_kev":true,"kev_date_added":"2022-01-21","kev_vendor_project":"SolarWinds","kev_product":"Serv-U","kev_vulnerability_name":"SolarWinds Serv-U Improper Input Validation Vulnerability","kev_short_description":"SolarWinds Serv-U versions 15.2.5 and earlier contain an improper input validation vulnerability that allows attackers to build and send queries without sanitization.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2022-02-04","kev_known_ransomware":false,"kev_notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-35247","kev_cwes":["CWE-20"],"epss_score":0.03359,"epss_percentile":0.87147,"epss_as_of":"2026-06-23","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.","published_at":"2022-01-07T22:39:50.564000Z","last_modified_at":null,"cvss_v3_score":4.3,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":false,"ssvc_technical_impact":"partial","cwes":["CWE-20"],"nvd_references":["https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35247","https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3_release_notes.htm"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-28T23:15:50.265257Z"},"effective_severity":"MEDIUM","badges":["kev"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"R","value_label":"Required"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"solarwinds","vendor_name":"SolarWinds","product_slug":"serv-u","product_name":"Serv-U","version_start":"15.2.5 and previous versions","version_start_inclusive":true,"version_end":"15.3","version_end_inclusive":false,"cpe23_uri":"cve5:solarwinds:serv-u:15.2.5 and previous versions:15.3"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.solarwinds.com/trust-center/security-advisories/cve-2021-35247","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-3_release_notes.htm","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2022-01-07T22:39:50.564000Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2022-01-21T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"ssvc_changed","at":"2026-06-24T00:31:44.034298Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:44.034298Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:44.034298Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:44.034298Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:44.034298Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:44.034298Z","label":"CVSS score revised","source":"vulnrichment"}]}