Vulnerability details

CVE-2026-90693

D-Link DIR-878

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

CVSS 4.0

9.4Critical

Official 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.

CVSS scores

Score	Version	Source	Vector
9.4Critical	4.0	CVEProject cvelistV5 (CNA) (VulDB)	`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`
9.9Critical	3.1	CVEProject cvelistV5 (CNA) (VulDB)	`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`
9.9Critical	3.0	CVEProject cvelistV5 (CNA) (VulDB)	`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`
9.0High	2.0	CVEProject cvelistV5 (CNA) (VulDB)	`AV:N/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR`

Affected products

Vendor	Product	Versions	Source
D-Link	DIR-878	120B05	CVEProject cvelistV5 (CNA)

References and advisories

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
https://vuldb.com/submit/915573 third-party-advisory
https://www.dlink.com/ product
https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/d-link/dir-878/SetWan3Settings/README.md related

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Details

Published: 2026-09-14
Last updated: 2026-09-15
State: Published
Assigner (CNA): VulDB

Exploit prediction (EPSS)

0.9%

Probability of exploitation in 30 days

60.1%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

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