How severe is CVE-2010-1261?

CVE-2010-1261 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2010-1261 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 25% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-1261?

CVE-2010-1261 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2010-1261?

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-2010-1261 published?

CVE-2010-1261 was published on 2010-06-08 and last updated on 2026-06-16.

CVE-2010-1261

CVE-2010-1261 is a critical-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 25% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 25% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Microsoft Internet Explorer
Published: 2010-06-08
Last modified: 2026-06-16

Description

The IE8 Developer Toolbar in Microsoft Internet Explorer 8 SP1, SP2, and SP3 allows user-assisted remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, leading to memory corruption, aka "Uninitialized Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2010-1261?: The IE8 Developer Toolbar in Microsoft Internet Explorer 8 SP1, SP2, and SP3 allows user-assisted remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, leading to memory corruption, aka "Uninitialized Memory Corruption Vulnerability."
How severe is CVE-2010-1261?: CVE-2010-1261 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2010-1261 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 25% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-1261?: CVE-2010-1261 affects Microsoft Internet Explorer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2010-1261?: 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-2010-1261 published?: CVE-2010-1261 was published on 2010-06-08 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*

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