How severe is CVE-2025-10666?

CVE-2025-10666 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-2025-10666 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-10666?

CVE-2025-10666 affects Dlink Dir-825 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-10666?

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-2025-10666 have an EU (EUVD) identifier?

Yes. CVE-2025-10666 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29982.

When was CVE-2025-10666 published?

CVE-2025-10666 was published on 2025-09-18 and last updated on 2026-06-17.

CVE-2025-10666

CVE-2025-10666 is a high-severity vulnerability in Dlink Dir-825 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-120.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-29982
Weakness: CWE-120
Affected product: Dlink Dir-825 Firmware
Published: 2025-09-18
Last modified: 2026-06-17

Description

A security flaw has been discovered in D-Link DIR-825 up to 2.10. Affected by this vulnerability is the function sub_4106d4 of the file apply.cgi. The manipulation of the argument countdown_time results in buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be exploited. This vulnerability only affects products that are no longer supported by the maintainer.

Frequently asked questions

What is CVE-2025-10666?: A security flaw has been discovered in D-Link DIR-825 up to 2.10. Affected by this vulnerability is the function sub_4106d4 of the file apply.cgi. The manipulation of the argument countdown_time results in buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be exploited. This vulnerability only affects products that are no longer supported by the maintainer.
How severe is CVE-2025-10666?: CVE-2025-10666 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-2025-10666 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-10666?: CVE-2025-10666 affects Dlink Dir-825 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-10666?: 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-2025-10666 have an EU (EUVD) identifier?: Yes. CVE-2025-10666 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-29982.
When was CVE-2025-10666 published?: CVE-2025-10666 was published on 2025-09-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-825_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-825 Firmware

CVE-2025-7206 — Critical (CVSS 9.8): A vulnerability, which was classified as critical, has been found in D-Link DIR-825 2.10. This issue affects the…
CVE-2022-47035 — Critical (CVSS 9.8): Buffer Overflow Vulnerability in D-Link DIR-825 v1.33.0.44ebdd4-embedded and below allows attacker to execute arbitrary…
CVE-2021-46442 — Critical (CVSS 9.8): In the "webupg" binary of D-Link DIR-825 G1, attackers can bypass authentication through parameters "autoupgrade.asp",…
CVE-2019-16920 — Critical (CVSS 9.8): Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. The…
CVE-2026-7068 — High (CVSS 8.8): A vulnerability was identified in D-Link DIR-825 3.00b32. This affects the function NMBD_process of the file sserver.c…
CVE-2025-10034 — High (CVSS 8.8): A vulnerability was found in D-Link DIR-825 1.08.01. This impacts the function get_ping6_app_stat of the file…

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