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Exploited vulnerability · CISA KEV

Is CVE-2020-8515 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · DrayTek Multiple Vigor Routers · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-8515, Multiple DrayTek Vigor Routers Web Management Page Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 641 days after it was published. It affects DrayTek Multiple Vigor Routers. 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

DrayTek Vigor3900, Vigor2960, and Vigor300B routers contain an unspecified vulnerability that allows for remote code execution.

VendorDrayTek (5 exploited CVEs in KEV)
ProductMultiple Vigor Routers
VulnerabilityMultiple DrayTek Vigor Routers Web Management Page Vulnerability
WeaknessCWE-78
Published1 Feb 2020
Added to KEV3 Nov 2021
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Multiple Vigor Routers in your asset inventory, including appliances and cloud images. Stack check lists every exploited DrayTek 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 1 Feb 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for DrayTek.

Other exploited CVEs in Multiple Vigor Routers

References

Questions

Is CVE-2020-8515 being exploited?

Yes. CISA added CVE-2020-8515 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-8515 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-2020-8515?

Apply updates per vendor instructions. Check DrayTek's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Multiple Vigor Routers 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 · DrayTek scorecard · act-now radar.

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