CVE-2025-9938

Name: CVE-2025-9938
Creator: NVD / NIST
Published: 2025-09-04T10:42:38.27+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 1.40%

Last modified Jun 17, 2026

CVE-2025-9938 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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. EPSS estimates a 1.40% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

1.40%

68.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dlink	Di-8400 Firmware	16.07.26a1

References

https://github.com/ZZ2266/.github.io/tree/main/Dlink/DI-8400/yyxz.aspExploit, Third Party Advisory
https://github.com/ZZ2266/.github.io/tree/main/Dlink/DI-8400/yyxz.asp#proof-of-concept-pocExploit, Third Party Advisory
https://vuldb.com/?ctiid.322340Permissions Required, VDB Entry
https://vuldb.com/?id.322340Third Party Advisory, VDB Entry
https://vuldb.com/?submit.643446Third Party Advisory, VDB Entry
https://www.dlink.com/Product

Timeline

Published: Sep 4, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-9938?

How severe is CVE-2025-9938?

CVE-2025-9938 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.

How do I fix CVE-2025-9938?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-9938?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST