What is CVE-2021-45740?

CVE-2021-45740 is a critical-severity vulnerability in Totolink A720r. CVSS score: 9.8/10. Published 2022-02-04.

How severe is CVE-2021-45740?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-45740 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Totolink A720r

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.

EPSS: 0.014 (68.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Totolink A720r
Totolink A720r_firmware — versions 4.1.5cu.470_b20200911
N/a — versions n/a

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-45740?: CVE-2021-45740 is a critical-severity vulnerability in Totolink A720r. CVSS score: 9.8/10. Published 2022-02-04.
How severe is CVE-2021-45740?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-45740 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.