CVE-2026-124561
D-Link DIR-878 HNAP prog.cgi SetVLANSettings stack-based overflow
A vulnerability was determined in D-Link DIR-878 1.20B05. This impacts the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. Executing a manipulation of the argument VID can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| DIR-878 D-Link |
1.20B05 (affected) | CNA: VulDB |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P | CNA: VulDB |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R | CNA: VulDB |
| 3.0 / 7.5 high |
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R | CNA: VulDB |
| 2.0 / 7.8 high |
AV:N/AC:L/Au:N/C:N/I:N/A:C/E:POC/RL:ND/RC:UR | CNA: VulDB |
Exploit evidence
References
- https://vuldb.com/vuln/432893CNA: VulDB · vdb-entry, technical-description
- https://vuldb.com/vuln/432893/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-124561CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1035617CNA: VulDB · third-party-advisory
- https://github.com/Zimo-666/DIR-878-cves/tree/main/03-settriggeradic-vlan-stack-overflowCNA: VulDB · broken-link, exploit
- https://www.dlink.com/CNA: VulDB · product
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.