What is CVE-2021-4076?

CVE-2021-4076 is a high-severity vulnerability in Tang Project, classified under Information Disclosure. CVSS score: 7.5/10. Published 2022-03-02.

How severe is CVE-2021-4076?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Tang Project

CVE-2021-4076

A flaw exists in tang, a network-based cryptographic binding server, which could result in leak of private keys.

Vulnerability class: Information Disclosure

Published 2022-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.016 (74.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Tang Project
Tang — versions Affects tang v8 and above | Fixed in tang v11.

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
github.com/latchset/tang/pull/81 (Patch, Third Party Advisory, Issue Tracking)
github.com/latchset/tang/commit/e82459fda10f0630c3414ed2afbc6320bb9ea7c9 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-4076?: CVE-2021-4076 is a high-severity vulnerability in Tang Project, classified under Information Disclosure. CVSS score: 7.5/10. Published 2022-03-02.
How severe is CVE-2021-4076?: High severity. CVSS v3 base score is 7.5 out of 10.