Every CVE Search/ Get API key

CVE-2021-4076

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

7.5 HighFix available

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

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

1.56%Up 0.7 points since Mar 3, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

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

Record
CVE-2021-4076
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness
CWE-200
Updated
2026-11-02
CVE List No score

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

Record
CVE-2021-4076
Weakness
CWE-200
Updated
2026-11-02
EUVDEUVD-2021-33968 No score

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

Record
EUVD-2021-33968
Updated
2026-11-03
GitHub AdvisoriesGHSA-83f4-c2vq-g2p3 7.5

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

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

Record
GHSA-83f4-c2vq-g2p3
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSV 7.5

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

Record
CVE-2021-4076
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2021-4076 7.5

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

Record
DEBIAN-CVE-2021-4076
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2021-4076 7.5

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

Record
UBUNTU-CVE-2021-4076
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
tang
Debian:12
 before 11-1
11-1
tang
Debian:13
 before 11-1
11-1
tang
Debian:14
 before 11-1
11-1
tang
Debian:11
 before 8-3+deb11u1, plus listed versions
8-3
8-3+deb11u1

History

History
RecordedChangedSources
affected
aliases, productsEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-4076 is a high vulnerability (CVSS 7.5) in Microsoft Tang, published December 19, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.56%, the 75th percentile. Fixed in tang 11-1.

References

Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open