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Exploited vulnerability · CISA KEV

Is CVE-2022-40799 exploited? Yes: in CISA KEV since 5 Aug 2025

Gociux · D-Link DNR-322L · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-40799, D-Link DNR-322L Download of Code Without Integrity Check Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 5 Aug 2025, 980 days after it was published. It affects D-Link DNR-322L. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 5 Aug 2025
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity8.8CVSS 3.1 · high
US federal due26 Aug 2025BOD 22-01 deadline

What it is

D-Link DNR-322L contains a download of code without integrity check vulnerability that could allow an authenticated attacker to execute OS level commands on the device. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

VendorD-Link (26 exploited CVEs in KEV)
ProductDNR-322L
VulnerabilityD-Link DNR-322L Download of Code Without Integrity Check Vulnerability
WeaknessCWE-494
Published29 Nov 2022
Added to KEV5 Aug 2025
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for DNR-322L in your asset inventory, including appliances and cloud images. Stack check lists every exploited D-Link CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 29 Nov 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for D-Link.

References

Questions

Is CVE-2022-40799 being exploited?

Yes. CISA added CVE-2022-40799 to the Known Exploited Vulnerabilities catalog on 5 Aug 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-40799 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2022-40799?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check D-Link's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected DNR-322L and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in August 2025 · D-Link scorecard · act-now radar.

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