CVE-2021-21818
CVSS v3
7.5
HIGH
EPSS Score
1.7 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A hard-coded password vulnerability exists in the Zebra IP Routing Manager functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to a denial of service. An attacker can send a sequence of requests to trigger this vulnerability.
Technical details
- Published
- 2021-07-16
Frequently asked questions
What is CVE-2021-21818?
A hard-coded password vulnerability exists in the Zebra IP Routing Manager functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to a denial of service. An attacker can send a sequence of requests to trigger this vulnerability.
Is CVE-2021-21818 actively exploited?
Active exploitation of CVE-2021-21818 has not been confirmed. Its EPSS score was 1.7% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-21818?
CVE-2021-21818 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-21818 affecting your environment?
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