CVE-2021-40423

Public Exploit

Description

A denial of service vulnerability exists in the cgiserver.cgi API command parser functionality of Reolink RLC-410W v3.0.0.136_20121102. A specially-crafted series of HTTP requests can lead to denial of service. An attacker can send an HTTP request to trigger this vulnerability.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.26%
Third-Party Advisory talosintelligence.com Third-Party Advisory talosintelligence.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://talosintelligence.com/vulnerability_reports/TALOS-2022-1432 third party advisory technical description broken link
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1432 exploit technical description third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-40423?
CVE-2021-40423 has been scored as a high severity vulnerability.
How to fix CVE-2021-40423?
To fix CVE-2021-40423, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-40423 being actively exploited in the wild?
It is possible that CVE-2021-40423 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.