How severe is CVE-2010-1256?

CVE-2010-1256 has a CVSS 2.0 base score of 8.5, rated high severity.

Is CVE-2010-1256 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-1256?

CVE-2010-1256 affects Microsoft Internet Information Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2010-1256?

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

When was CVE-2010-1256 published?

CVE-2010-1256 was published on 2010-06-08 and last updated on 2026-06-16.

CVE-2010-1256

CVE-2010-1256 is a high-severity vulnerability in Microsoft Internet Information Server with a CVSS 2.0 base score of 8.5. Its EPSS exploit-prediction score of 28% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 2.0 base score 8.5)
EPSS exploit prediction: 28% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Internet Information Server
Published: 2010-06-08
Last modified: 2026-06-16

Description

Unspecified vulnerability in Microsoft IIS 6.0, 7.0, and 7.5, when Extended Protection for Authentication is enabled, allows remote authenticated users to execute arbitrary code via unknown vectors related to "token checking" that trigger memory corruption, aka "IIS Authentication Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2010-1256?: Unspecified vulnerability in Microsoft IIS 6.0, 7.0, and 7.5, when Extended Protection for Authentication is enabled, allows remote authenticated users to execute arbitrary code via unknown vectors related to "token checking" that trigger memory corruption, aka "IIS Authentication Memory Corruption Vulnerability."
How severe is CVE-2010-1256?: CVE-2010-1256 has a CVSS 2.0 base score of 8.5, rated high severity.
Is CVE-2010-1256 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-1256?: CVE-2010-1256 affects Microsoft Internet Information Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2010-1256?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2010-1256 published?: CVE-2010-1256 was published on 2010-06-08 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:internet_information_server:6.0:*:*:*:*:*:*:*

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