CVE-2021-21816 Scanner.
D-Link DIR-3040 1.13B03 - Information Disclosure
Free and read-only. Scan only sites you own or are allowed to test.
What This Check Does.
Read-only
It only asks your site for public pages, the way a browser would. Nothing is changed, uploaded or stored.
Up to 1 request
A small, fixed number of requests, so the check is quick and will not load your site.
Looks for CVE-2021-21816
It looks for the specific sign of this one vulnerability and ends with a clear answer: vulnerable, not vulnerable, or could not be determined.
About CVE-2021-21816. What It Means.
D-Link DIR-3040 1.13B03 is susceptible to information disclosure in the Syslog functionality. A specially crafted HTTP network request can lead to the disclosure of sensitive information. An attacker can obtain access to user accounts and access sensitive information, modify data, and/or execute unauthorized operations.
FAQ
Common Questions.
D-Link DIR-3040 1.13B03 - Information Disclosure. D-Link DIR-3040 1.13B03 is susceptible to information disclosure in the Syslog functionality. A specially crafted HTTP network request can lead to the disclosure of sensitive information. An attacker can obtain access to user accounts and access sensitive information, modify data, and/or execute unauthorized operations.
Atlas sends up to 1 read-only request to your site and looks for the specific sign of CVE-2021-21816 in D-Link DIR-3040 Firmware. Nothing is changed, uploaded or stored on your site.
CVE-2021-21816 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing. Its CVSS score is 4.3.
Yes. The check only reads public pages, the same way a browser or a search engine would. Scan only sites you own or are allowed to test.
It means no sign of CVE-2021-21816 was found by this read-only check. It does not prove the site is free of other weaknesses.
Update D-Link DIR-3040 Firmware to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. The vendor links and details are in the CVE-2021-21816 briefing linked on this page.
Scan only sites you own or have written permission to test. A result of Not Vulnerable means this read-only check found no sign of CVE-2021-21816; it is not a guarantee that the site is secure.