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CVE-2021-21820: 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 s...
CVE-2021-21820 · published 5 years ago
Summary
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.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| dlink | dir-3040_firmware |
1.13b03 cpe:2.3:o:dlink:dir-3040_firmware:1.13b03:*:*:*:*:*:*:* |
Original advisory text
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 s...
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.
References
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1285 Exploit Third Party Advisory
Internet-facing
3 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically (estimated)
- Gives an attacker full control (estimated)
Type
CWE-798Use of Hard-coded Credentials
Timeline
Published16 Jul 2021
Updated30 Oct 2026
First seen29 Sep 2026
Sources
CVE-2021-21820 · NVD
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