How severe is CVE-2019-15849?

CVE-2019-15849 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2019-15849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-15849?

CVE-2019-15849 affects Eq-3 Homematic Ccu3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-15849?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-15849 published?

CVE-2019-15849 was published on 2019-10-17 and last updated on 2026-06-17.

CVE-2019-15849

CVE-2019-15849 is a high-severity vulnerability in Eq-3 Homematic Ccu3 Firmware with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-384.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 4.9
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Eq-3 Homematic Ccu3 Firmware
Published: 2019-10-17
Last modified: 2026-06-17

Description

eQ-3 HomeMatic CCU3 firmware 3.41.11 allows session fixation. An attacker can create session IDs and send them to the victim. After the victim logs in to the session, the attacker can use that session. The attacker could create SSH logins after a valid session and easily compromise the system.

Frequently asked questions

What is CVE-2019-15849?: eQ-3 HomeMatic CCU3 firmware 3.41.11 allows session fixation. An attacker can create session IDs and send them to the victim. After the victim logs in to the session, the attacker can use that session. The attacker could create SSH logins after a valid session and easily compromise the system.
How severe is CVE-2019-15849?: CVE-2019-15849 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2019-15849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-15849?: CVE-2019-15849 affects Eq-3 Homematic Ccu3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-15849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-15849 published?: CVE-2019-15849 was published on 2019-10-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:eq-3:homematic_ccu3_firmware:3.14.11:*:*:*:*:*:*:*

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