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High severity8.8NVD Advisory· Published Oct 25, 2021· Updated Jun 17, 2026

CVE-2021-34861

CVE-2021-34861

Description

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 webproc endpoint, which listens on TCP port 80 by default. 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-12104.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • Dlink/Dap 2020 Firmware
    cpe:2.3:o:dlink:dap-2020_firmware:*:*:*:*:*:*:*:*
    Range: <=1.01
  • Dlink/DAP-2020llm-create2 versions
    1.01rc001+ 1 more
    • (no CPE)range: 1.01rc001
    • (no CPE)range: 1.01rc001

Patches

Vulnerability mechanics

References

2

News mentions

0

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