CVE-2026-77021EPSS p29.9%

CVE-2026-77021CVE-2026-77021

Description

Improper handling of highly compressed data (data amplification) in Checkmk <2.5.0p14, <2.4.0p37, <2.3.0p51 and 2.2.0 (EOL) allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an arbitrary size.

Scoring

EPSS0.38% probability of exploitation · percentile 29.9% · 2026-10-05T12:00:23Z
Last modified2026-09-21
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.