High severity · published Sep 4, 2026
CVE-2026-86098
ntop nDPI before 6.0 Heap Buffer Overflow via ndpi_json_string_escape
7.4
CVSS
0.6%
EPSS
No
On KEV
Description
ntop nDPI versions before 6.0 contain a heap buffer overflow vulnerability in the ndpi_json_string_escape function that writes beyond caller-supplied buffer boundaries. Attackers can trigger the overflow by supplying crafted network packet data including TLS SNI, HTTP headers, or DNS names that reach the vulnerable function, causing heap corruption.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ND
nDPI · ntop
before 6.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86098
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86098
github.com
https://github.com/ntop/nDPI
github.com
https://github.com/ntop/nDPI/blob/5.0/src/lib/ndpi_serializer.c
github.com
https://github.com/ntop/nDPI/commit/94e82c1de12323d992895830231865736a8abf2c
www.vulncheck.com
https://www.vulncheck.com/advisories/ntop-ndpi-before-6.0-heap-buffer-overflow-via-ndpi-json-string-escape
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