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 Cloud Network Video Recorder involving the download of code without an integrity check (CWE-494). This flaw could allow an authenticated attacker to execute operating system (OS) level commands on the device.
Exposure and applicability
This vulnerability applies specifically to the D-Link DNR-322L model. In industrial environments, these devices are typically deployed as part of physical security infrastructure to monitor plant perimeters, critical equipment areas, and facility access points.
Asset owners should note that the impacted products may be end-of-life (EoL) or end-of-service (EoS). This status implies that official vendor updates may no longer be available for these devices.
Remediation priorities
Based on the reported vulnerability and the EoL/EoS status of the hardware, our analysis suggests the following prioritized actions:
- Device Decommissioning: Because the source indicates products may be EoL/EoS and recommends discontinuing utilization, the primary recommendation is to replace these units with supported hardware that receives active security updates.
- Access Restriction: Until devices can be replaced, owners should ensure that management interfaces are not exposed to the public internet and are restricted to a dedicated, isolated management VLAN to limit the pool of potential authenticated attackers.
- Credential Audit: Since the vulnerability requires authentication, rotating passwords and removing unnecessary administrative accounts could reduce the likelihood of an attacker gaining the necessary access to exploit the flaw.
How to validate remediation
Validation depends on the chosen path:
* For replacement: Verify that the DNR-322L units have been physically removed from the network and replaced with supported hardware.
* For isolation: Use network topology maps or firewall configuration audits to confirm that the device is unreachable from untrusted zones.
* For credentialing: Review the local user list on the device to ensure only authorized personnel possess administrative credentials.
Limits and open questions
It remains unknown whether this vulnerability has been utilized in ransomware campaigns. Furthermore, because the product may be EoL/EoS, there is a significant risk that no official patch exists to resolve the underlying integrity check failure. Users should verify the current support status of their specific hardware version directly with the vendor.
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: September 15, 2026 at 01:32 UTC.
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