CVE-2021-20216

7.5 highEPSS 2.3%

High (7.5) in privoxy privoxy. EPSS 2.3% chance of exploitation in the next 30 days.

A flaw was found in Privoxy in versions before 3.0.31. A memory leak that occurs when decompression fails unexpectedly may lead to a denial of service. The highest threat from this vulnerability is to system availability.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 2.3% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-31)
CWEs: CWE-401, CWE-400
Published: 2021-03-25
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

privoxy:privoxy

References

https://bugzilla.redhat.com/show_bug.cgi?id=1923256
https://security.gentoo.org/glsa/202107-16
https://www.openwall.com/lists/oss-security/2021/01/31/2
https://www.privoxy.org/3.0.31/user-manual/whatsnew.html
https://bugzilla.redhat.com/show_bug.cgi?id=1923256

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