{"cve":{"cve_id":"CVE-2026-45542","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":0.00325,"epss_percentile":0.24089,"epss_as_of":"2026-06-23","description":"ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.6, 5.3.5, 5.4.4, 5.5.4, and 6.0, a heap buffer overflow exists in the Security Scheme 2 (SRP6a) session-setup path of the protocomm component. The first-phase handler (handle_session_command0() in components/protocomm/src/security/security2.c) trusts the length of a client-supplied protobuf field for the SRP6a username and copies it into a buffer whose size is derived from a narrower destination type. The resulting truncation-versus-copy asymmetry corrupts the heap when an oversized value is supplied. This issue has been patched in versions 5.2.7, 5.3.6, 5.4.5, 5.5.5, and 6.0.1.","published_at":"2026-06-10T00:34:53.238000Z","last_modified_at":null,"cvss_v3_score":7.1,"cvss_v3_vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","cvss_v3_severity":"HIGH","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-122"],"nvd_references":["https://github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jh","https://github.com/espressif/esp-idf/commit/0ea58d79845ad674d0358d5de246015a68c4cb4f","https://github.com/espressif/esp-idf/commit/56c3e385611e63162d0f2f8504ac4ae2ccfccef0","https://github.com/espressif/esp-idf/commit/71eb2dbe6aaef830719ecac8edf409e2992b64b2","https://github.com/espressif/esp-idf/commit/9b4cacf9cbc69379972de6a2247fcf5af9240961","https://github.com/espressif/esp-idf/commit/a2f4554f10ba075c98cbc67464db096ba32497cf","https://github.com/espressif/esp-idf/commit/f5d24a7e919bc5f447091479656b86da6762a103"],"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":"2026-06-28T23:30:33.078798Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","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":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.2.6","version_start_inclusive":true,"version_end":"= 5.2.6","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.2.6:= 5.2.6"},{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.3.5","version_start_inclusive":true,"version_end":"= 5.3.5","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.3.5:= 5.3.5"},{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.4.4","version_start_inclusive":true,"version_end":"= 5.4.4","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.4.4:= 5.4.4"},{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 5.5.4","version_start_inclusive":true,"version_end":"= 5.5.4","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 5.5.4:= 5.5.4"},{"vendor_slug":"espressif","vendor_name":"espressif","product_slug":"esp-idf","product_name":"esp-idf","version_start":"= 6.0","version_start_inclusive":true,"version_end":"= 6.0","version_end_inclusive":true,"cpe23_uri":"cve5:espressif:esp-idf:= 6.0:= 6.0"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/espressif/esp-idf/security/advisories/GHSA-9r76-858f-v6jh","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/espressif/esp-idf/commit/0ea58d79845ad674d0358d5de246015a68c4cb4f","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/56c3e385611e63162d0f2f8504ac4ae2ccfccef0","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/71eb2dbe6aaef830719ecac8edf409e2992b64b2","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/9b4cacf9cbc69379972de6a2247fcf5af9240961","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/a2f4554f10ba075c98cbc67464db096ba32497cf","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/espressif/esp-idf/commit/f5d24a7e919bc5f447091479656b86da6762a103","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-10T00:34:53.238000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:54:40.246008Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:54:40.246008Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:54:40.246008Z","label":"CVSS score revised","source":"cvelistv5"}]}