How severe is CVE-2018-0771?

CVE-2018-0771 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2018-0771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-0771?

CVE-2018-0771 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-0771?

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

When was CVE-2018-0771 published?

CVE-2018-0771 was published on 2018-02-15 and last updated on 2026-06-17.

CVE-2018-0771

CVE-2018-0771 is a medium-severity vulnerability in Microsoft Edge with a CVSS 3.x base score of 4.3. 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 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Edge
Published: 2018-02-15
Last modified: 2026-06-17

Description

Microsoft Edge in Microsoft Windows 10 1607, 1703, and Windows Server 2016 allows a security feature bypass, due to how Edge handles different-origin requests, aka "Microsoft Edge Security Feature Bypass".

Frequently asked questions

What is CVE-2018-0771?: Microsoft Edge in Microsoft Windows 10 1607, 1703, and Windows Server 2016 allows a security feature bypass, due to how Edge handles different-origin requests, aka "Microsoft Edge Security Feature Bypass".
How severe is CVE-2018-0771?: CVE-2018-0771 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2018-0771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-0771?: CVE-2018-0771 affects Microsoft Edge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-0771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-0771 published?: CVE-2018-0771 was published on 2018-02-15 and last updated on 2026-06-17.

References

Affected products (1)

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

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