CVE-2021-33032

10.0 CRITICAL 52% exploit odds Drop everything Fix listed Injection Device

What it is

A Remote Code Execution (RCE) vulnerability in the WebUI component of the eQ-3 HomeMatic CCU2 firmware up to and including version 2.57.5 and CCU3 firmware up to and including version 3.57.5 allows remote unauthenticated attackers to execute system commands as root via a simple HTTP request.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 52.2% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-05-14 00:00 UTC ReservedThe CVE id was reserved by its CNA
2021-07-22 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:54 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 52.2% in the next 30 days (EPSS).
Severity: 10.0 CRITICAL (CVSS).
Fix: a patch or advisory is linked.
It meets the bar for Drop everything: critical, and exploited or very likely to be.

Details

Published: 2021-07-22 18:15 UTC
Last modified: 2026-06-17 03:54 UTC
Exploit probability: 52.2% · EPSS, next 30 days
Weakness: CWE-78 · OS command injection
Record status: Modified

Affected

eq-3 Homematic ccu2 Firmware ≤ 2.57.5
eq-3 Homematic ccu3 Firmware ≤ 3.57.5

Attack profile CVSS 3.1 · 10.0

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-33032.md and follow it. Check whether this project is affected by CVE-2021-33032. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record