Critical severity9.8NVD Advisory· Published Mar 31, 2022· Updated Jun 17, 2026
CVE-2021-43722
CVE-2021-43722
Description
D-Link DIR-645 1.03 A1 is vulnerable to Buffer Overflow. The hnap_main function in the cgibin handler uses sprintf to format the soapaction header onto the stack and has no limit on the size.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:o:dlink:dir-645_firmware:1.03:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
2- github.com/luqiut/iot/blob/main/DIR-645%20Stack%20overflow.mdnvdExploitThird Party Advisory
- www.dlink.com/en/security-bulletin/nvdVendor Advisory
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