CVE-2021-46784

6.5 MEDIUM 5% exploit odds Fix listed Denial of service Server

What it is

In Squid 3.x through 3.5.28, 4.x through 4.17, and 5.x before 5.6, due to improper buffer management, a Denial of Service can occur when processing long Gopher server responses.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. High risk of service disruption.
Exploit odds: 5.1% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2022-07-17 22:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 04:15 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 5.1% in the next 30 days (EPSS).
Severity: 6.5 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2022-07-17 22:15 UTC
Last modified: 2026-06-17 04:15 UTC
Exploit probability: 5.1% · EPSS, next 30 days
Weakness: CWE-617
Record status: Modified

Affected

squid-cache Squid ≤ 3.5.28
squid-cache Squid ≤ 4.17
squid-cache Squid < 5.6
Debian Linux 10.0
Debian Linux 11.0
Debian Linux 12.0

Attack profile CVSS 3.1 · 6.5

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-46784.md and follow it. Check whether this project is affected by CVE-2021-46784. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record