Buffer overflow in Ntop Ntopng
CVE-2026-97371
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Ntop Ntopng — versions < 6.7.260721
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-97371?
- CVE-2026-97371 is a medium-severity vulnerability in Ntop Ntopng, classified under Stack-based Buffer Overflow. CVSS score: 5.3/10. Published 2026-11-05.
- How severe is CVE-2026-97371?
- Medium severity. CVSS v3 base score is 5.3 out of 10.