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CVE-2025-9938

D-Link DI-8400 yyxz.asp yyxz_dlink_asp stack-based overflow

HIGH
8.8
CVSS Score
Published: September 3, 2025 at 11:32 PM UTC
Updated: June 17, 2026 at 10:10 AM UTC
2 products affected across 1 vendorDi 8400 FirmwareDI-8400

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Severity
HIGH8.8
Exploit prediction
EPSS 2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Di 8400 Firmware· D-Link
95%
16.07.26a1
dlink-di-8400 (same device)
DI-8400· D-Link
60%
16.07.26A1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

RelatedExploitThird Party Advisory
Source: [email protected]
https://github.com/ZZ2266/.github.io/tree/main/Dlink/DI-8400/yyxz.asp
ExploitThird Party Advisory
Source: [email protected]
https://github.com/ZZ2266/.github.io/tree/main/Dlink/DI-8400/yyxz.asp#proof-of-concept-poc
SignaturePermissions RequiredVDB Entry
Source: [email protected]
https://vuldb.com/?ctiid.322340
VDB EntryTechnical DescriptionThird Party Advisory
Source: [email protected]
https://vuldb.com/?id.322340
Third Party AdvisoryVDB Entry
Source: [email protected]
https://vuldb.com/?submit.643446
Product
Source: [email protected]
https://www.dlink.com/

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-119CWE-121CWE-787

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