Is CVE-2021-28652 actively exploited?

CVE-2021-28652 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-28652?

CVE-2021-28652 has a CVSS score of 4.9 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2021-28652?

Patch guidance is available from squid-cache security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-28652.

CVE-2021-28652 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-28652?

6 products: squid-cache squid, squid-cache squid, debian debian linux, debian debian linux, fedoraproject fedora, and 1 more.

Description

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to incorrect parser validation, it allows a Denial of Service attack against the Cache Manager API. This allows a trusted client to trigger memory leaks that. over time, lead to a Denial of Service via an unspecified short query string. This attack is limited to clients with Cache Manager API access privilege.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: high
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-401

Metadata

Primary Vendor: SQUID-CACHE
Published: 5/27/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

squid-cache : squidsquid-cache : squiddebian : debian_linuxdebian : debian_linuxfedoraproject : fedorafedoraproject : fedora

Remediation Guidance

Executive Summary

Cite this page

CVE-2021-28652. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2021-28652

View on NIST NVD

CVE-2021-28652 vulnerability