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Exploited vulnerability · CISA KEV

Is CVE-2016-7201 exploited? Yes: in CISA KEV since 28 Mar 2022

Gociux · Microsoft Edge · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2016-7201, Microsoft Edge Memory Corruption Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 28 Mar 2022, 1964 days after it was published. It affects Microsoft Edge. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 28 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity8.8CVSS 3.1 · high
US federal due18 Apr 2022BOD 22-01 deadline

What it is

The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute remote code or cause a denial of service (memory corruption) via a crafted web site.

VendorMicrosoft (391 exploited CVEs in KEV)
ProductEdge
VulnerabilityMicrosoft Edge Memory Corruption Vulnerability
WeaknessCWE-119
Published10 Nov 2016
Added to KEV28 Mar 2022
Reported by (CNA)microsoft

What to do

  1. Check whether you run it. Look for Edge in your asset inventory, including appliances and cloud images. Stack check lists every exploited Microsoft 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 10 Nov 2016.
  4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

Other exploited CVEs in Edge

References

Questions

Is CVE-2016-7201 being exploited?

Yes. CISA added CVE-2016-7201 to the Known Exploited Vulnerabilities catalog on 28 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2016-7201 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-2016-7201?

Apply updates per vendor instructions. Check Microsoft's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Edge 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 March 2022 · Microsoft scorecard · act-now radar.

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