How severe is CVE-2011-2426?

CVE-2011-2426 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2011-2426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2426?

CVE-2011-2426 primarily affects Adobe Flash Player. In total, 95 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2426?

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-2011-2426 published?

CVE-2011-2426 was published on 2011-09-22 and last updated on 2026-06-16.

CVE-2011-2426

CVE-2011-2426 is a critical-severity vulnerability in Adobe Flash Player with a CVSS 2.0 base score of 9.3. 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Adobe Flash Player
Published: 2011-09-22
Last modified: 2026-06-16

Description

Stack-based buffer overflow in the ActionScript Virtual Machine (AVM) component in Adobe Flash Player before 10.3.183.10 on Windows, Mac OS X, Linux, and Solaris, and before 10.3.186.7 on Android, allows remote attackers to execute arbitrary code via unspecified vectors.

Frequently asked questions

What is CVE-2011-2426?: Stack-based buffer overflow in the ActionScript Virtual Machine (AVM) component in Adobe Flash Player before 10.3.183.10 on Windows, Mac OS X, Linux, and Solaris, and before 10.3.186.7 on Android, allows remote attackers to execute arbitrary code via unspecified vectors.
How severe is CVE-2011-2426?: CVE-2011-2426 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2011-2426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2426?: CVE-2011-2426 primarily affects Adobe Flash Player. In total, 95 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2426?: 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-2011-2426 published?: CVE-2011-2426 was published on 2011-09-22 and last updated on 2026-06-16.

References

Affected products (95)

cpe:2.3:a:adobe:flash_player:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:6.0.21.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:6.0.79:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.14.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.19.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.24.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.25:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.53.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.60.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.61.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.63:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.66.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.67.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.68.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.69.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.70.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.0.73.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.1:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.1.1:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:7.2:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:8.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:8.0.22.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:8.0.24.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:8.0.33.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:8.0.34.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:8.0.35.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:8.0.39.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:8.0.42.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.16:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.18d60:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.20:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.20.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.28:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.28.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.31:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.31.0:*:*:*:*:*:*:*
cpe:2.3:a:adobe:flash_player:9.0.45.0:*:*:*:*:*:*:*

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