CVE-2023-5632
CWE-834Published: October 18, 2023· Updated: Jun 17, 2026
Official Description
In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption. This could be used by a malicious actor to perform denial of service type attack. This issue is fixed in 2.0.6
Technical Analysis
CVE-2023-5632 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.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-834)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-5632 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts