How severe is CVE-2010-4254?

CVE-2010-4254 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2010-4254 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4254?

CVE-2010-4254 primarily affects Mono. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-4254?

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-2010-4254 published?

CVE-2010-4254 was published on 2010-12-06 and last updated on 2026-06-16.

CVE-2010-4254

CVE-2010-4254 is a high-severity vulnerability in Mono with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Mono
Published: 2010-12-06
Last modified: 2026-06-16

Description

Mono, when Moonlight before 2.3.0.1 or 2.99.x before 2.99.0.10 is used, does not properly validate arguments to generic methods, which allows remote attackers to bypass generic constraints, and possibly execute arbitrary code, via a crafted method call.

Frequently asked questions

What is CVE-2010-4254?: Mono, when Moonlight before 2.3.0.1 or 2.99.x before 2.99.0.10 is used, does not properly validate arguments to generic methods, which allows remote attackers to bypass generic constraints, and possibly execute arbitrary code, via a crafted method call.
How severe is CVE-2010-4254?: CVE-2010-4254 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2010-4254 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-4254?: CVE-2010-4254 primarily affects Mono. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-4254?: 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-2010-4254 published?: CVE-2010-4254 was published on 2010-12-06 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:mono:mono:*:*:*:*:*:*:*:*
cpe:2.3:a:novell:moonlight:*:*:*:*:*:*:*:*
cpe:2.3:a:novell:moonlight:2.99.0:*:*:*:*:*:*:*
cpe:2.3:a:novell:moonlight:2.99.1:*:*:*:*:*:*:*
cpe:2.3:a:novell:moonlight:2.99.2:*:*:*:*:*:*:*
cpe:2.3:a:novell:moonlight:2.99.7:*:*:*:*:*:*:*
cpe:2.3:a:novell:moonlight:2.99.9:*:*:*:*:*:*:*

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