CVE-2026-124560: D-Link DIR-878 HNAP prog.cgi GetCAPTCHAsetting heap-based overflow
- Is it exploited?
Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.
- How likely is exploitation in the next 30 days?
- 0.7%
EPSS score, percentile 54.4 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 9.3 Critical
CVSS v4.0 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
No patch or vendor advisory is listed in the CVE record. Check D-Link's advisories.
A public exploit is linked in the references.
- Which versions are affected?
Affected
- 1.20B05
Source: CISA KEV 2026.11.10, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
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.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
No patch, vendor advisory or mitigation is listed in the CVE record. Check D-Link's own security advisories for a fix, and compare your version with the affected versions below.
A public exploit is linked in the references.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (1 product)
| Status | Versions |
|---|---|
| Affected | 1.20B05 |
Source: CVE List, as of . About the data.
Weakness
CWE-122, CWE-119
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published |
References
6
Known exploited D-Link vulnerabilities
- CVE-2025-29635: D-Link DIR-823X Command Injection Vulnerability
- CVE-2022-37055: D-Link Routers Buffer Overflow Vulnerability
- CVE-2020-25078: D-Link DCS-2530L and DCS-2670L Devices Unspecified Vulnerability
- CVE-2020-25079: D-Link DCS-2530L and DCS-2670L Command Injection Vulnerability
- CVE-2022-40799: D-Link DNR-322L Download of Code Without Integrity Check Vulnerability