How severe is CVE-2015-6139?

CVE-2015-6139 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2015-6139 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6139?

CVE-2015-6139 primarily affects Microsoft Edge. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6139?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-6139 published?

CVE-2015-6139 was published on 2015-12-09 and last updated on 2026-06-17.

CVE-2015-6139

CVE-2015-6139 is a critical-severity vulnerability in Microsoft Edge with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 16% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-264.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 16% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Microsoft Edge
Published: 2015-12-09
Last modified: 2026-06-17

Description

Microsoft Internet Explorer 11 and Microsoft Edge mishandle content types, which allows remote attackers to execute arbitrary web script in a privileged context via a crafted web site, aka "Microsoft Browser Elevation of Privilege Vulnerability."

Frequently asked questions

What is CVE-2015-6139?: Microsoft Internet Explorer 11 and Microsoft Edge mishandle content types, which allows remote attackers to execute arbitrary web script in a privileged context via a crafted web site, aka "Microsoft Browser Elevation of Privilege Vulnerability."
How severe is CVE-2015-6139?: CVE-2015-6139 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2015-6139 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6139?: CVE-2015-6139 primarily affects Microsoft Edge. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6139?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-6139 published?: CVE-2015-6139 was published on 2015-12-09 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:microsoft:edge:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*

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