How severe is CVE-2017-0066?

CVE-2017-0066 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-0066 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-0066?

CVE-2017-0066 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-0066?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-0066 published?

CVE-2017-0066 was published on 2017-03-17 and last updated on 2026-06-17.

CVE-2017-0066

CVE-2017-0066 is a medium-severity vulnerability in Microsoft Edge with a CVSS 3.x base score of 4.2. Its EPSS exploit-prediction score of 30% places it in the 98th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 3.x base score 4.2)
CVSS v2: 4.0
EPSS exploit prediction: 30% (98th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Edge
Published: 2017-03-17
Last modified: 2026-06-17

Description

Microsoft Edge allows remote attackers to bypass the Same Origin Policy for HTML elements in other browser windows, aka "Microsoft Edge Security Feature Bypass Vulnerability." This vulnerability is different from those described in CVE-2017-0135 and CVE-2017-0140.

Frequently asked questions

What is CVE-2017-0066?: Microsoft Edge allows remote attackers to bypass the Same Origin Policy for HTML elements in other browser windows, aka "Microsoft Edge Security Feature Bypass Vulnerability." This vulnerability is different from those described in CVE-2017-0135 and CVE-2017-0140.
How severe is CVE-2017-0066?: CVE-2017-0066 has a CVSS 3.x base score of 4.2, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-0066 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-0066?: CVE-2017-0066 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-0066?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-0066 published?: CVE-2017-0066 was published on 2017-03-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:edge:*:*:*:*:*:*:*:*

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