CVE-2026-124560

CRITICAL 9.8

D-Link DIR-878 HNAP prog.cgi GetCAPTCHAsetting heap-based overflow

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability was found in D-Link DIR-878 1.20B05. This affects the function GetCAPTCHAsetting of the file bin/prog.cgi of the component HNAP Handler. Performing a manipulation of the argument uid results in heap-based buffer overflow. The attack can be initiated remotely. The exploit has been made public and could be used. This vulnerability only affects products that are no longer supported by the maintainer.

CWE	CWE-122 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:H/I:H/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/432892 vuldb.com: https://vuldb.com/vuln/432892/cti vuldb.com: https://vuldb.com/cve/CVE-2026-124560 vuldb.com: https://vuldb.com/submit/1035616 github.com: https://github.com/Zimo-666/DIR-878-cves/tree/main/01-captcha-uid-heap-overflow dlink.com: https://www.dlink.com/

Credits

🔍 ha ha-yang (VulDB User)