CVE-2026-77021
5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Checkmk GmbH | Checkmk | 2.5.0 < 2.5.0p14 | affected |
| Checkmk GmbH | Checkmk | 2.4.0 < 2.4.0p37 | affected |
| Checkmk GmbH | Checkmk | 2.3.0 < 2.3.0p51 | affected |
| Checkmk GmbH | Checkmk | 2.2.0 | affected |
Weaknesses
- CWE-409: CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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