CVE-2021-34862
mediumpriority · track · 35EPSS 0.008 · 57 %ileEURUUSEPSS · scored 2026-10-27
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 1.01rc001 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the var:menu parameter provided to the webproc endpoint. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13270.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–8.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2021100105cnnvd
- https://www.zerodayinitiative.com/advisories/ZDI-21-978/cnnvd
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201enisa_euvd
- https://www.zerodayinitiative.com/advisories/ZDI-21-978/enisa_euvd
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201PatchVendor Advisorynvd
- https://www.zerodayinitiative.com/advisories/ZDI-21-978/Third Party AdvisoryVDB Entrynvd
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