How severe is CVE-2015-6056?

CVE-2015-6056 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2015-6056 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6056?

CVE-2015-6056 primarily affects Microsoft Jscript. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6056?

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-2015-6056 published?

CVE-2015-6056 was published on 2015-10-14 and last updated on 2026-06-17.

CVE-2015-6056

CVE-2015-6056 is a critical-severity vulnerability in Microsoft Jscript with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Microsoft Jscript
Published: 2015-10-14
Last modified: 2026-06-17

Description

The (1) JScript and (2) VBScript engines in Microsoft Internet Explorer 9 through 11 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2015-6056?: The (1) JScript and (2) VBScript engines in Microsoft Internet Explorer 9 through 11 allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka "Scripting Engine Memory Corruption Vulnerability."
How severe is CVE-2015-6056?: CVE-2015-6056 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2015-6056 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6056?: CVE-2015-6056 primarily affects Microsoft Jscript. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6056?: 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-2015-6056 published?: CVE-2015-6056 was published on 2015-10-14 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:microsoft:jscript:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:vbscript:-:*:*:*:*:*:*:*

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CVE-2011-0663 — High (CVSS 8.8): Multiple integer overflows in the Microsoft (1) JScript 5.6 through 5.8 and (2) VBScript 5.6 through 5.8 scripting…

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