What’s Vulnerable › Vulnerabilities

CVE-2026-116744: ntop nDPI through 6.0 Out-of-Bounds Read in SoftEther Dissector

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-26 · updated 2026-10-31
• Weakness: CWE-125

Description

ntop nDPI through 6.0 contains an out-of-bounds read vulnerability in dissect_softether_host_fqdn() in softether.c that compares host_name using the consumed byte count instead of data length. Remote attackers can send crafted short UDP datagrams on already-classified SoftEther flows, causing strncmp to read beyond the packet payload buffer.

Affected products

• ntop nDPI: through 6.0

References

• https://github.com/ntop/nDPI
• https://github.com/ntop/nDPI/blob/6.0/src/lib/protocols/softether.c#L203
• https://github.com/ntop/nDPI/commit/ca9d819151606377ac53305583fe819748c69be2
• https://github.com/ntop/nDPI/issues/3291
• https://github.com/ntop/nDPI/pull/3298
• https://hackmd.io/@haindpwn/ndpi-softether-host-fqdn-strncmp-oob-read
• https://www.vulncheck.com/advisories/ntop-ndpi-through-6.0-out-of-bounds-read-in-softether-dissector

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