CVE-2026-97371
ntopng: Stack buffer overflow (write) in nDPI custom category detection allows remote code execution via crafted network packets
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 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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| ntopng ntop |
< 6.7.260721 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 5.3 medium |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | CNA: GitHub_M |
Exploit evidence
- https://github.com/ntop/ntopng/security/advisories/GHSA-26jm-9qfw-89w7
exploit · ADP: CISA-ADP
References
- https://github.com/ntop/ntopng/security/advisories/GHSA-26jm-9qfw-89w7CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/ntop/ntopng/commit/96acb6187950a6a49ca827e49973c3e0c27ea664CNA: GitHub_M · x_refsource_MISC
- https://github.com/ntop/ntopng/security/advisories/GHSA-26jm-9qfw-89w7ADP: CISA-ADP · exploit
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