No exploitation reportedFix available

CVE-2019-10122

Q: Is CVE-2019-10122 actively exploited?

Active exploitation of CVE-2019-10122 has not been confirmed. Its EPSS score was 4.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-10122?

CVE-2019-10122 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2019-07-10
Fixed in2.41.9
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

eQ-3 HomeMatic CCU2 devices before 2.41.9 and CCU3 devices before 3.43.16 have buffer overflows in the ReGa ise GmbH HTTP-Server 2.0 component, aka HMCCU-179. This may lead to remote code execution.

Timeline

dates in UTC

2019-07-1012:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-10122?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-10122?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Eq-3 ccu2 firmwareversion to verify

Branch	Affected	Fixed in	Source
2.41	< 2.41.9	2.41.9	NVD

Eq-3 ccu3 firmwareversion to verify

Branch	Affected	Fixed in	Source
3.43	< 3.43.16	3.43.16	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Eq-3 ccu2 firmware to 2.41.9

Advisories and patches

www.eq-3.deRelease Notes · Vendor Advisory
www.eq-3.deRelease Notes · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.09.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score4.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2019-07-10
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-10122?

eQ-3 HomeMatic CCU2 devices before 2.41.9 and CCU3 devices before 3.43.16 have buffer overflows in the ReGa ise GmbH HTTP-Server 2.0 component, aka HMCCU-179. This may lead to remote code execution.

Is CVE-2019-10122 actively exploited?

Active exploitation of CVE-2019-10122 has not been confirmed. Its EPSS score was 4.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-10122?

CVE-2019-10122 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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