{"id":"CVE-2026-55687","title":"ESF-IDF is the Espressif Internet of Things (IOT) Development Framework","summary":"ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. Versions 6.0.1, 5.5.4, 5.4.4, 5.3.5, and possibly prior contain an out-of-bounds write in jpeg_parse_dqt_marker() in components/esp_driver_jpeg/jpeg_parse_marker.c …","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-121","CWE-787"],"published":"2026-07-10","updated":"2026-07-10","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55687","references":[{"url":"https://github.com/espressif/esp-idf/commit/303c01305acb8ae5c4eb24a1786300681b4822a4","label":"security-advisories@github.com"},{"url":"https://github.com/espressif/esp-idf/commit/6ffafe8e93142ef8ffe51a6311d4abfc0f10fe77","label":"security-advisories@github.com"},{"url":"https://github.com/espressif/esp-idf/commit/7ccfc00f39faf1b7e5919f45b56fe44ba699d7c1","label":"security-advisories@github.com"},{"url":"https://github.com/espressif/esp-idf/commit/82c5c2dad45313786fb7e973059bc9094d95c3b2","label":"security-advisories@github.com"},{"url":"https://github.com/espressif/esp-idf/commit/f2df45bcedef11354e83c31a9718d680a68422c4","label":"security-advisories@github.com"},{"url":"https://github.com/espressif/esp-idf/releases/tag/v6.0.2","label":"security-advisories@github.com"},{"url":"https://github.com/espressif/esp-idf/security/advisories/GHSA-v6r2-f6p2-88cj","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.007,"epssPercentile":0.51765,"ingestedAt":"2026-07-11T20:15:26.097Z","slug":"CVE-2026-55687","body":"## Overview\n\nESF-IDF is the Espressif Internet of Things (IOT) Development Framework. Versions 6.0.1, 5.5.4, 5.4.4, 5.3.5, and possibly prior contain an out-of-bounds write in jpeg_parse_dqt_marker() in components/esp_driver_jpeg/jpeg_parse_marker.c because the attacker-controlled DQT marker Tq nibble is used as an index into the qt_tbl array without validating that it is in the range 0..3, allowing malformed JPEG input to corrupt stack memory and reliably trigger a denial of service. This issue is fixed in version 6.0.2 and is expected to be fixed in versions 5.5.5, 5.4.5, and 5.3.6.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}