{"id":"CVE-2026-97371","title":"ntopng: Stack buffer overflow (write) in nDPI custom category detection allows remote code execution via crafted network packets","summary":"ntopng is a web-based network traffic monitoring application. Prior to 6.7.260721, ndpi_get_custom_category_match writes a four-byte nDPI protocol-category value through a pointer to the two-byte id variable in IpAddress::reloadBlacklist…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-121"],"vendor":"ntop","product":"ntopng","affected":["ntopng < 6.7.260721"],"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-05T20:57:20.546560Z"},"exploitAvailable":true,"published":"2026-11-05","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:57:38.887Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97371","references":[{"url":"https://github.com/ntop/ntopng/security/advisories/GHSA-26jm-9qfw-89w7","label":"https://github.com/ntop/ntopng/security/advisories/GHSA-26jm-9qfw-89w7"},{"url":"https://github.com/ntop/ntopng/commit/96acb6187950a6a49ca827e49973c3e0c27ea664","label":"https://github.com/ntop/ntopng/commit/96acb6187950a6a49ca827e49973c3e0c27ea664"}],"tags":["cve.org","exploit-available"],"ingestedAt":"2026-11-05T22:38:31.936Z","slug":"CVE-2026-97371","body":"## Overview\n\nntopng is a web-based network traffic monitoring application. Prior to 6.7.260721, ndpi_get_custom_category_match writes a four-byte nDPI protocol-category value through a pointer to the two-byte id variable in IpAddress::reloadBlacklist in src/IpAddress.cpp during packet dissection and host initialization. A remote unauthenticated attacker on a monitored network segment can send packets that match custom-category rules, causing stack corruption and denial of service without user interaction. This issue is fixed in version 6.7.260721.\n\n## Affected\n\n- `ntopng < 6.7.260721`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}