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Known exploited vulnerability

CVE-2021-40407

highCVSS 3.1 7.2In CISA KEVEPSS 48%Published · n/a

The short answer

CVE-2021-40407 affects n/a n/a and is rated high (CVSS 7.2). CISA added it to the Known Exploited Vulnerabilities catalog on 2024-12-18: attackers are using it, so patch it first.

What it is

An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [1] or [2], based on DDNS type, the ddns->domain variable, that has the value of the domain parameter provided through the SetDdns API, is not validated properly. This would lead to an OS command injection. An attacker can send an HTTP request to trigger this vulnerability.

Weakness: CWE-78.

Severity

7.2 high

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploited (CISA KEV)

Yes, since Dec 18, 2024

Federal due date Jan 8, 2025

EPSS, next 30 days

48%

Higher than 99% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

What CISA says to do

The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization if a current mitigation is unavailable.

Affected products

n/a. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2021-40407 being exploited?

Yes. CISA added CVE-2021-40407 to its Known Exploited Vulnerabilities catalog on 2024-12-18, with a federal remediation due date of 2025-01-08.

How do I fix CVE-2021-40407?

CISA's required action: The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization if a current mitigation is unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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