CVE-2026-90693

D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflow

State: Published
Severity: 9.4 Critical
Published: Sep 14, 2026
Updated: Sep 15, 2026
Reserved: Sep 13, 2026

Description

A flaw has been found in D-Link DIR-878 120B05. This impacts the function SetWan3Settings of the component WAN Settings. This manipulation of the argument Primary/Secondary causes stack-based buffer overflow. Remote exploitation of the attack is possible.

Scores

CVSS	Score	Vector	Source
4.0	9.4 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X	VulDB
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:R	VulDB
3.0	9.9 Critical	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR	VulDB

Weaknesses

CWE-121 Stack-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
DIR-878D-Link	120B05Affected

References

VDB-403226 | D-Link DIR-878 WAN Settings SetWan3Settings stack-based overflowvdb-entrytechnical-description
VDB-403226 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-90693 | CVE Analysis and Reportthird-party-advisory
Submit #915573 | D-Link Router FW120B05_decode Memory Corruptionthird-party-advisory
https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-878/SetWan3Settings/README.mdrelated
https://www.dlink.com/product

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