How severe is CVE-2017-8642?

CVE-2017-8642 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-8642 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8642?

CVE-2017-8642 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-8642?

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

When was CVE-2017-8642 published?

CVE-2017-8642 was published on 2017-08-08 and last updated on 2026-06-17.

CVE-2017-8642

CVE-2017-8642 is a medium-severity vulnerability in Microsoft Edge with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Microsoft Edge
Published: 2017-08-08
Last modified: 2026-06-17

Description

Microsoft Edge in Microsoft Windows 10 1703 allows an attacker to elevate privileges due to the way that Microsoft Edge validates JavaScript under specific conditions, aka "Microsoft Edge Elevation of Privilege Vulnerability". This CVE ID is unique from CVE-2017-8503.

Frequently asked questions

What is CVE-2017-8642?: Microsoft Edge in Microsoft Windows 10 1703 allows an attacker to elevate privileges due to the way that Microsoft Edge validates JavaScript under specific conditions, aka "Microsoft Edge Elevation of Privilege Vulnerability". This CVE ID is unique from CVE-2017-8503.
How severe is CVE-2017-8642?: CVE-2017-8642 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-8642 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8642?: CVE-2017-8642 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-8642?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8642 published?: CVE-2017-8642 was published on 2017-08-08 and last updated on 2026-06-17.

References

Affected products (1)

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

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