CVE-2021-34201 json
D-Link DIR-2640-US 1.01B04 is vulnerable to Buffer Overflow.
published 2021-06-16 5 y ago modified 2026-07-09 4 mo ago also EUVD-2021-20863
- cvss
- 7.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
D-Link DIR-2640-US 1.01B04 is vulnerable to Buffer Overflow. There are multiple out-of-bounds vulnerabilities in some processes of D-Link AC2600(DIR-2640). Local ordinary users can overwrite the global variables in the .bss section, causing the process crashes or changes.
Exploit prediction
0.54% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/liyansong2018/CVE/tree/main/2021/CVE-2021-34201 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| NVD | 2.0 | 3.6 | AV:L/AC:L/Au:N/C:N/I:P/A:P |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/liyansong2018/CVE/tree/main/2021/CVE-2021-34201
exploit, third-party-advisory
-
dlink.com
/en/security-bulletin/
vendor-advisory
Sources
- CVE List CVE-2021-34201
- NVD CVE-2021-34201
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