{"cve":{"cve_id":"CVE-2021-27254","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00487,"epss_percentile":0.38074,"epss_as_of":"2026-06-23","description":"This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7800. Authentication is not required to exploit this vulnerability. The specific flaw exists within the apply_save.cgi endpoint. This issue results from the use of hard-coded encryption key. An attacker can leverage this vulnerability to execute arbitrary code in the context of root. Was ZDI-CAN-12287.","published_at":"2021-03-05T20:00:23Z","last_modified_at":null,"cvss_v3_score":6.3,"cvss_v3_vector":"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-259"],"nvd_references":["https://www.zerodayinitiative.com/advisories/ZDI-21-252/","https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders"],"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":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:15:21.269295Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"A","value_label":"Adjacent"},{"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":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"L","value_label":"Low"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"L","value_label":"Low"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"netgear","vendor_name":"NETGEAR","product_slug":"r7800","product_name":"R7800","version_start":"firmware version 1.0.2.76","version_start_inclusive":true,"version_end":"firmware version 1.0.2.76","version_end_inclusive":true,"cpe23_uri":"cve5:netgear:r7800:firmware version 1.0.2.76:firmware version 1.0.2.76"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-252/","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2021-03-05T20:00:23Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:17:49.905977Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:17:49.905977Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:17:49.905977Z","label":"CVSS score revised","source":"cvelistv5"}]}