How severe is CVE-2025-9938?

CVE-2025-9938 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-2025-9938 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-9938?

CVE-2025-9938 affects Dlink Di-8400 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-9938?

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-2025-9938 have an EU (EUVD) identifier?

Yes. CVE-2025-9938 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26658.

When was CVE-2025-9938 published?

CVE-2025-9938 was published on 2025-09-04 and last updated on 2026-06-17.

CVE-2025-9938

CVE-2025-9938 is a high-severity vulnerability in Dlink Di-8400 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-26658
Weakness: CWE-787
Affected product: Dlink Di-8400 Firmware
Published: 2025-09-04
Last modified: 2026-06-17

Description

A weakness has been identified in D-Link DI-8400 16.07.26A1. The affected element is the function yyxz_dlink_asp of the file /yyxz.asp. This manipulation of the argument ID causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be exploited.

Frequently asked questions

What is CVE-2025-9938?: A weakness has been identified in D-Link DI-8400 16.07.26A1. The affected element is the function yyxz_dlink_asp of the file /yyxz.asp. This manipulation of the argument ID causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be exploited.
How severe is CVE-2025-9938?: CVE-2025-9938 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-2025-9938 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-9938?: CVE-2025-9938 affects Dlink Di-8400 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-9938?: 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-2025-9938 have an EU (EUVD) identifier?: Yes. CVE-2025-9938 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26658.
When was CVE-2025-9938 published?: CVE-2025-9938 was published on 2025-09-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:di-8400_firmware:16.07.26a1:*:*:*:*:*:*:*

More vulnerabilities in Dlink Di-8400 Firmware

CVE-2024-44400 — Critical (CVSS 9.8): A vulnerability was discovered in DI_8400-16.07.26A1, which has been classified as critical. This issue affects the…
CVE-2024-52739 — High (CVSS 8.0): D-LINK DI-8400 v16.07.26A1 was discovered to contain multiple remote command execution (RCE) vulnerabilities in the…
CVE-2025-52222 — High (CVSS 7.5): D-Link DI-8003 v16.07.26A1, DI-8500 v16.07.26A1; DI-8003G v17.12.21A1, DI-8200G v17.12.20A1, DI-8200 v16.07.26A1,…
CVE-2025-8175 — Medium (CVSS 6.5): A vulnerability was found in D-Link DI-8400 16.07.26A1. It has been classified as problematic. This affects an unknown…

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