CVE-2021-45740
CVSS v3
9.8
CRITICAL
EPSS Score
1.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
TOTOLINK A720R v4.1.5cu.470_B20200911 was discovered to contain a stack overflow in the setWiFiWpsStart function. This vulnerability allows attackers to cause a Denial of Service (DoS) via the pin parameter.
Technical details
- Published
- 2022-02-04
Frequently asked questions
What is CVE-2021-45740?
TOTOLINK A720R v4.1.5cu.470_B20200911 was discovered to contain a stack overflow in the setWiFiWpsStart function. This vulnerability allows attackers to cause a Denial of Service (DoS) via the pin parameter.
Is CVE-2021-45740 actively exploited?
Active exploitation of CVE-2021-45740 has not been confirmed. Its EPSS score was 1.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-45740?
CVE-2021-45740 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2021-45740 affecting your environment?
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