CVE-2021-43722 json
D-Link DIR-645 1.03 A1 is vulnerable to Buffer Overflow.
published 2022-03-31 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30629
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.2%
- EPSS 3.2% chance of exploitation in 30 days, percentile 88%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
3.16% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/luqiut/iot/blob/main/DIR-645%20Stack%20overflow.md referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/luqiut/iot/blob/main/DIR-645%20Stack%20overflow.md
exploit, third-party-advisory
-
dlink.com
/en/security-bulletin/
vendor-advisory
Sources
- CVE List CVE-2021-43722
- NVD CVE-2021-43722
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