Historical catalog analysis: CISA added this entry on August 05, 2025. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.
What the vulnerability is
CVE-2022-40799 is a vulnerability in the D-Link DNR-322L network video recorder involving the download of code without integrity checks (CWE-494). This flaw allows an attacker who has already authenticated to the device to execute operating system (OS) level commands.
Exposure and applicability
This vulnerability specifically affects the D-Link DNR-322L. The risk is applicable to environments where these devices are still deployed and accessible to users with authentication credentials. Because the affected products may be end-of-life (EoL) or end-of-service (EoS), they likely lack current vendor support or official security updates for this flaw.
Remediation priorities
Based on the EoL/EoS status of the hardware, our analysis suggests that traditional patching is unlikely to be a viable path. We prioritize the following actions:
- Asset Identification and Decommissioning: The primary recommendation is to discontinue the use of the DNR-322L. Vulnerability management teams should identify all active instances of this model and schedule them for removal from the network.
- Access Restriction: For devices that cannot be immediately decommissioned, defenders should restrict administrative access to a highly limited set of trusted IP addresses to reduce the likelihood of an authenticated attacker reaching the device interface.
- Credential Rotation: If the device remains in use during a decommissioning phase, rotating all administrative credentials could reduce the risk of unauthorized authentication.
How to validate remediation
Verification must move beyond simple version checks, as no current patch is indicated for these EoL devices. Remediation is verified when:
* Asset Inventory Confirmation: The asset inventory reflects that the DNR-322L has been physically removed or logically disconnected from the network.
* Network Reachability Testing: A scan of the management subnet confirms that the device’s IP address is no longer responsive, proving it is no longer exposed to potential authenticated attackers.
Limits and open questions
Because the product is EoL/EoS, there is a significant risk that other unpatched vulnerabilities exist alongside CVE-2022-40799. The primary limitation of any mitigation short of decommissioning is that the underlying architectural flaw (lack of integrity checks) remains present. It is unknown whether this vulnerability has been leveraged in active ransomware campaigns.
Source and editorial note
CVE-2022-40799: D-Link DNR-322L Download of Code Without Integrity Check Vulnerability · Source date: August 05, 2025 · Retrieved August 31, 2026.
Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.
Archive date: August 08, 2025. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: October 06, 2026 at 00:27 UTC.
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