Is CVE-2026-33526 actively exploited?

No active exploitation of CVE-2026-33526 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-33526 be exploited remotely?

Yes. CVE-2026-33526 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-33526?

CVE-2026-33526 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-33526

CWE-416Published: March 26, 2026· Updated: Mar 31, 2026

7.5

CVSS v3.1

EPSS:1.98%probability of exploitation in 30 daysPercentile:83.5th

Official Description

Squid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack against the Squid service using ICP protocol. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem _cannot_ be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.

NVD Source

Technical Analysis

CVE-2026-33526 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.