Security readout for executives and security teams
Plain-English summary
This flaw lets someone with a valid account on a D-Link DNR-322L recorder abuse the backup-configuration function to run operating-system commands. That can expose recorder data, alter settings, or disrupt availability. CISA lists it in KEV, so treat it as a known exploited issue.
Executive priority
Prioritize remediation for exposed or operationally important recorders. The issue requires credentials, but KEV status means real attackers have used it, and successful compromise can affect surveillance availability and integrity.
Technical view
CVE-2022-40799 is a data-integrity failure in Backup Config on D-Link DNR-322L firmware versions up to 2.60B15. The CVSS 3.1 score is 8.8, with network access, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to organizations still running D-Link DNR-322L devices at firmware 2.60B15 or earlier, especially where management access is reachable from untrusted networks or weakly controlled accounts exist.
Exploitation context
Active exploitation is supported by the CISA Known Exploited Vulnerabilities listing. The provided sources do not establish public exploit prevalence, attacker identity, or campaign details beyond known exploitation.
Researcher notes
The source bundle identifies the vulnerable function and impact but does not provide authoritative fix details. Avoid assuming broader D-Link impact. Validation should focus on product, firmware, administrative reachability, and suspicious configuration-backup activity.
Mitigation direction
- Identify all D-Link DNR-322L recorders and firmware versions.
- Check D-Link and CISA guidance for vendor-supported remediation.
- Restrict management access to trusted administrative networks only.
- Disable or remove affected devices if no supported remediation exists.
- Review and tighten accounts allowed to access recorder administration.
Validation and detection
- Confirm whether any DNR-322L device runs firmware 2.60B15 or earlier.
- Verify management interfaces are not exposed to the public internet.
- Review administrative logs for unusual Backup Config activity.
- Check for unexpected configuration changes or device-level persistence indicators.
- Track the asset against CISA KEV remediation requirements.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-494: Exact CWE lookup
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Open ATT&CK lookupCVE-2022-40799 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://gitlab.com/lu-ka/cve-2022-40799CVE reference
- https://www.dlink.com/uk/en/products/dnr-322l-cloud-network-video-recorderCVE reference · product
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-40799CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Download of Code Without Integrity Check
Download of Code Without Integrity Check represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.