CVE-2026-124563

HIGH 7.5

D-Link DIR-878 HNAP SetWanSettings buffer overflow

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

A security flaw has been discovered in D-Link DIR-878 1.20B05. Affected by this vulnerability is the function SetWanSettings of the component HNAP Handler. The manipulation of the argument Primary/Secondary results in buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.

CWE	CWE-120 CWE-119
Vendor	d-link
Product	dir-878
Published	Nov 9, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

D-Link / DIR-878

1.20B05

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/432895 vuldb.com: https://vuldb.com/vuln/432895/cti vuldb.com: https://vuldb.com/cve/CVE-2026-124563 vuldb.com: https://vuldb.com/submit/1035619 github.com: https://github.com/Zimo-666/DIR-878-cves/tree/main/05-setwansettings-l2tp-pptp-dns-overflow dlink.com: https://www.dlink.com/

Credits

🔍 ha ha-yang (VulDB User)