How severe is CVE-2025-6334?

CVE-2025-6334 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-6334 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-2025-6334?

CVE-2025-6334 affects Dlink Dir-867 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6334?

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.

Does CVE-2025-6334 have an EU (EUVD) identifier?

Yes. CVE-2025-6334 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18738.

When was CVE-2025-6334 published?

CVE-2025-6334 was published on 2025-06-20 and last updated on 2026-06-17.

CVE-2025-6334

CVE-2025-6334 is a high-severity vulnerability in Dlink Dir-867 Firmware with a CVSS 3.x base score of 8.8. 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-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18738
Weakness: CWE-119
Affected product: Dlink Dir-867 Firmware
Published: 2025-06-20
Last modified: 2026-06-17

Description

A vulnerability has been found in D-Link DIR-867 1.0 and classified as critical. This vulnerability affects the function strncpy of the component Query String Handler. The manipulation leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

Frequently asked questions

What is CVE-2025-6334?: A vulnerability has been found in D-Link DIR-867 1.0 and classified as critical. This vulnerability affects the function strncpy of the component Query String Handler. The manipulation leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
How severe is CVE-2025-6334?: CVE-2025-6334 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-6334 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-2025-6334?: CVE-2025-6334 affects Dlink Dir-867 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6334?: 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.
Does CVE-2025-6334 have an EU (EUVD) identifier?: Yes. CVE-2025-6334 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18738.
When was CVE-2025-6334 published?: CVE-2025-6334 was published on 2025-06-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-867_firmware:1.0:*:*:*:*:*:*:*

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