How severe is CVE-2017-8637?

CVE-2017-8637 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-8637 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8637?

CVE-2017-8637 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-8637?

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

When was CVE-2017-8637 published?

CVE-2017-8637 was published on 2017-08-08 and last updated on 2026-06-17.

CVE-2017-8637

CVE-2017-8637 is a medium-severity vulnerability in Microsoft Edge with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 2.6
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
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 bypass Arbitrary Code Guard (ACG) due to how Microsoft Edge accesses memory in code compiled by the Edge Just-In-Time (JIT) compiler, aka "Scripting Engine Security Feature Bypass Vulnerability".

Frequently asked questions

What is CVE-2017-8637?: Microsoft Edge in Microsoft Windows 10 1703 allows an attacker to bypass Arbitrary Code Guard (ACG) due to how Microsoft Edge accesses memory in code compiled by the Edge Just-In-Time (JIT) compiler, aka "Scripting Engine Security Feature Bypass Vulnerability".
How severe is CVE-2017-8637?: CVE-2017-8637 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-8637 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8637?: CVE-2017-8637 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-8637?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8637 published?: CVE-2017-8637 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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