CVE-2026-124560
D-Link DIR-878 HNAP prog.cgi GetCAPTCHAsetting heap-based overflow
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.
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 / 9.3 critical |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P | CNA: VulDB |
| 3.1 / 9.8 critical |
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 | CNA: VulDB |
| 3.0 / 9.8 critical |
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R | CNA: VulDB |
| 2.0 / 10.0 critical |
AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | CNA: VulDB |
Exploit evidence
- https://github.com/Zimo-666/DIR-878-cves/tree/main/01-captcha-uid-heap-overflow
exploit · CNA: VulDB
References
- https://vuldb.com/vuln/432892CNA: VulDB · vdb-entry, technical-description
- https://vuldb.com/vuln/432892/ctiCNA: VulDB · signature, permissions-required
- https://vuldb.com/cve/CVE-2026-124560CNA: VulDB · third-party-advisory
- https://vuldb.com/submit/1035616CNA: VulDB · third-party-advisory
- https://github.com/Zimo-666/DIR-878-cves/tree/main/01-captcha-uid-heap-overflowCNA: VulDB · broken-link, exploit
- https://www.dlink.com/CNA: VulDB · product
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