CVE-2021-34830

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-07-15 · updated 2026-06-17
Weakness: CWE-121

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1330 1.13B01 BETA routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the Cookie HTTP header. 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 the device. Was ZDI-CAN-12028.

Affected products

D-Link DAP-1330: 1.13b01-beta

References

https://www.zerodayinitiative.com/advisories/ZDI-21-682/
https://www.zerodayinitiative.com/advisories/ZDI-21-682/

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