What is CVE-2021-36082?

CVE-2021-36082 is a high-severity vulnerability in Ntop Ndpi, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-07-01.

How severe is CVE-2021-36082?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Ntop Ndpi

CVE-2021-36082

ntop nDPI 3.4 has a stack-based buffer overflow in processClientServerHello.

Vulnerability class: Buffer Overflow

Published 2021-07-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.2th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Ntop Ndpi — versions 3.4

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/ntop/nDPI/commit/1ec621c85b9411cc611652fd57a892cfef478af3 (Patch, Third Party Advisory)
bugs.chromium.org/p/oss-fuzz/issues/detail (Exploit, Patch, Third Party Advisory, Issue Tracking)
github.com/google/oss-fuzz-vulns/blob/main/vulns/ndpi/OSV-2021-304.yaml (Third Party Advisory)

Frequently asked questions

What is CVE-2021-36082?: CVE-2021-36082 is a high-severity vulnerability in Ntop Ndpi, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-07-01.
How severe is CVE-2021-36082?: High severity. CVSS v3 base score is 8.8 out of 10.