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CRITICAL

CVE-2021-29978

CVSS v3

9.8

CRITICAL

EPSS Score

2.8 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2021-29978 yet.

Full record on NVD

Description

Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.

Technical details

Published
2021-08-05

Frequently asked questions

What is CVE-2021-29978?

Multiple low security issues were discovered and fixed in a security audit of Mozilla VPN 2.x branch as part of a 3rd party security audit. This vulnerability affects Mozilla VPN < 2.3.

Is CVE-2021-29978 actively exploited?

Active exploitation of CVE-2021-29978 has not been confirmed. Its EPSS score was 2.8% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-29978?

CVE-2021-29978 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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