CVE-2021-21820
9.8
CRITICAL · CVSS 3.1 · EPSS 3% (pctl 87)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
Description
A hard-coded password vulnerability exists in the Libcli Test Environment functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to code execution. An attacker can send a sequence of requests to trigger this vulnerability.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 2.96% — more likely to be exploited than 87% of all CVEs |
| Weakness | CWE-798 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-07-16 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| dlink | dir-3040 |
| dlink | dir-3040 firmware |
References
→ the Explorer · watch your stack · NVD