CVE-2021-33586

—

CVSS 3.1

4.3 medium

EPSS

<1%p57

Published

May 27, 2021 (May 27, 2021)

Modified

Jun 17, 2026

Description

InspIRCd 3.8.0 through 3.9.x before 3.10.0 allows any user (able to connect to the server) to access recently deallocated memory, aka the "malformed PONG" issue.

Vendors: inspircd
Products: inspircd
Weakness: CWE-732
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.9%)

In the news0 stories

No ingested article mentions this CVE yet.