How severe is CVE-2013-3154?

CVE-2013-3154 has a CVSS 2.0 base score of 6.9, rated medium severity.

Is CVE-2013-3154 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-3154?

CVE-2013-3154 primarily affects Microsoft Windows Defender. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-3154?

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

When was CVE-2013-3154 published?

CVE-2013-3154 was published on 2013-07-10 and last updated on 2026-06-16.

CVE-2013-3154

CVE-2013-3154 is a medium-severity vulnerability in Microsoft Windows Defender with a CVSS 2.0 base score of 6.9. 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-264.

Key facts

Severity: Medium (CVSS 2.0 base score 6.9)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Microsoft Windows Defender
Published: 2013-07-10
Last modified: 2026-06-16

Description

The signature-update functionality in Windows Defender on Microsoft Windows 7 and Windows Server 2008 R2 relies on an incorrect pathname, which allows local users to gain privileges via a Trojan horse application in the %SYSTEMDRIVE% top-level directory, aka "Microsoft Windows 7 Defender Improper Pathname Vulnerability."

Frequently asked questions

What is CVE-2013-3154?: The signature-update functionality in Windows Defender on Microsoft Windows 7 and Windows Server 2008 R2 relies on an incorrect pathname, which allows local users to gain privileges via a Trojan horse application in the %SYSTEMDRIVE% top-level directory, aka "Microsoft Windows 7 Defender Improper Pathname Vulnerability."
How severe is CVE-2013-3154?: CVE-2013-3154 has a CVSS 2.0 base score of 6.9, rated medium severity.
Is CVE-2013-3154 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-3154?: CVE-2013-3154 primarily affects Microsoft Windows Defender. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-3154?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-3154 published?: CVE-2013-3154 was published on 2013-07-10 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:microsoft:windows_defender:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_7:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:*:r2:x64:*:*:*:*:*

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