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Vulnerability record · CVE-2021-34829 · published 15 July 2021

CVE-2021-34829: Dlink dap-1330 firmware classic buffer overflow vulnerability

Dlink · Dap 1330 Firmware

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 HNAP_AUTH 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 buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-12065.

8.8 CVSS 3.1 High EPSS 2.3% · top 17.1% CWE-120 · Classic buffer overflow
8.8CVSS 3.1 base score, v2 8.3
2.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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 HNAP_AUTH 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 buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-12065.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.zerodayinitiative.com/advisories/ZDI-21-681/ Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-681/ Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2022-29328Dlink dap-1330 firmware out-of-bounds write vulnerabilityD-Link DAP-1330_OSS-firmware_1.00b21 was discovered to contain a stack overflow via the function checkvalidupgrade.EPSS 14%9.8CVE-2022-29329Dlink dap-1330 firmware out-of-bounds write vulnerabilityD-Link DAP-1330_OSS-firmware_1.00b21 was discovered to contain a heap overflow via the devicename parameter in /goform/setDeviceSettings.EPSS 14%8.8CVE-2021-34827Dlink dap-1330 firmware stack-based buffer overflow vulnerabilityThis vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1330 1.13B01 BETA routers. Aut…EPSS 2.3%8.8CVE-2021-34828Dlink dap-1330 firmware classic buffer overflow vulnerabilityThis vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1330 1.13B01 BETA routers. Aut…EPSS 2.3%8.8CVE-2021-34830Dlink dap-1330 firmware stack-based buffer overflow vulnerabilityThis vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-1330 1.13B01 BETA routers. Aut…EPSS 2.3%8.8CVE-2020-8861Dlink dap-1330 firmware improper authentication vulnerabilityThis vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DAP-1330 1.10B01 BETA Wi-Fi range e…EPSS 6.5%5.5CVE-2025-43520Apple OS kernel memory corruption via malicious appA memory corruption flaw (classic buffer overflow) in Apple's kernel was fixed across iOS, iPadOS, macOS, tvOS, visionOS and watchOS. A malicious app…KEVEPSS 0.43%analysed8.8CVE-2025-31277Apple WebKit memory corruption via malicious web contentApple WebKit fails to handle memory correctly when processing crafted web content, leading to memory corruption across Safari, iOS, iPadOS, macOS, tv…KEVEPSS 1.6%analysed

Source: NIST National Vulnerability Database (record CVE-2021-34829), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.