Stack-based Buffer Overflow in D-Link Router's WAN Settings
CVE-2026-90693

9.4CRITICAL

Key Information:

Vendor

D-link
Status
Dir-878
Vendor
CVE Published:
14 September 2026

What is CVE-2026-90693?

A critical flaw has been identified in the D-Link DIR-878 120B05 related to its WAN Settings, specifically in the SetWan3Settings function. This vulnerability allows for a stack-based buffer overflow by manipulating the Primary/Secondary argument. Consequently, this opens the potential for remote exploitation, exposing users to a variety of security risks. Immediate action is advised to mitigate the impact of this vulnerability.

Affected Version(s)

DIR-878 120B05

References

https://vuldb.com/vuln/403226
vdb-entrytechnical-description
https://vuldb.com/vuln/403226/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90693
third-party-advisory

CVSS V4

Score:
9.4
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AmaIIl (VulDB User)
.