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Exploited vulnerability · CISA KEV

Is CVE-2020-25506 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · D-Link DNS-320 Device · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-25506, D-Link DNS-320 Device Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 274 days after it was published. It affects D-Link DNS-320 Device. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due3 May 2022BOD 22-01 deadline

What it is

D-Link DNS-320 device contains a command injection vulnerability in the sytem_mgr.cgi component that may allow for remote code execution.

VendorD-Link (26 exploited CVEs in KEV)
ProductDNS-320 Device
VulnerabilityD-Link DNS-320 Device Command Injection Vulnerability
WeaknessCWE-78
Published2 Feb 2021
Added to KEV3 Nov 2021
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for DNS-320 Device in your asset inventory, including appliances and cloud images. Stack check lists every exploited D-Link CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  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 2 Feb 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for D-Link.

References

Questions

Is CVE-2020-25506 being exploited?

Yes. CISA added CVE-2020-25506 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-25506 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-2020-25506?

Apply updates per vendor instructions. Check D-Link's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected DNS-320 Device 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 November 2021 · D-Link scorecard · act-now radar.

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