VULNERABILITY INTELLIGENCE
CVE-2021-33620
CVSS score6.5 MEDIUM
EPSS probability79.58%
CISA KEVNot currently listed
Published2021-05-28
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Description
Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.
Weakness classification
- nvd@nist.gov: CWE-20
Primary references
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org — Mailing List, Patch, Vendor Advisory
- cve@mitre.org — Mailing List, Patch, Vendor Advisory
- cve@mitre.org — Patch, Third Party Advisory
- cve@mitre.org — Mailing List, Third Party Advisory
- cve@mitre.org
- cve@mitre.org
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory