How severe is CVE-2025-34071?

CVE-2025-34071 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-34071 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34071?

CVE-2025-34071 affects Gfi Kerio Control. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-34071?

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

Does CVE-2025-34071 have an EU (EUVD) identifier?

Yes. CVE-2025-34071 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19720.

When was CVE-2025-34071 published?

CVE-2025-34071 was published on 2025-07-02 and last updated on 2026-06-17.

CVE-2025-34071

CVE-2025-34071 is a critical-severity vulnerability in Gfi Kerio Control with a CVSS 3.x base score of 9.8. 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.4
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19720
Weakness: CWE-306
Affected product: Gfi Kerio Control
Published: 2025-07-02
Last modified: 2026-06-17

Description

A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access to upload and execute arbitrary code through the firmware upgrade feature. The system upgrade mechanism accepts unsigned .img files, which can be modified to include malicious scripts within the upgrade.sh or disk image components. These modified upgrade images are not validated for authenticity or integrity, and are executed by the system post-upload, enabling root access.

Frequently asked questions

What is CVE-2025-34071?: A remote code execution vulnerability in GFI Kerio Control 9.4.5 allows attackers with administrative access to upload and execute arbitrary code through the firmware upgrade feature. The system upgrade mechanism accepts unsigned .img files, which can be modified to include malicious scripts within the upgrade.sh or disk image components. These modified upgrade images are not validated for authenticity or integrity, and are executed by the system post-upload, enabling root access.
How severe is CVE-2025-34071?: CVE-2025-34071 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-34071 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34071?: CVE-2025-34071 affects Gfi Kerio Control. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-34071?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-34071 have an EU (EUVD) identifier?: Yes. CVE-2025-34071 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19720.
When was CVE-2025-34071 published?: CVE-2025-34071 was published on 2025-07-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gfi:kerio_control:9.4.5:-:*:*:*:*:*:*

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