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CVE-2011-1271

The JIT compiler in Microsoft .NET Framework 3.5 Gold and SP1, 3.5.1, and 4.0, when IsJITOptimizerDisabled is false, does not properly…

High7.7EPSS 20.1%
Published
Updated
Reserved
Assigned by
microsoft

Description

The JIT compiler in Microsoft .NET Framework 3.5 Gold and SP1, 3.5.1, and 4.0, when IsJITOptimizerDisabled is false, does not properly handle expressions related to null strings, which allows context-dependent attackers to bypass intended access restrictions, and consequently execute arbitrary code, in opportunistic circumstances by leveraging a crafted application, as demonstrated by (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka ".NET Framework JIT Optimization Vulnerability."

Scores

CVSS scores of CVE-2011-1271, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1High7.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
NVDNVD · Modified3.1High7.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
EPSS (exploitation in 30 days)
20.1% · top 2.5% of all CVEs (2 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total

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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.

Weakness

Affected products

  • n/a

    • affected n/a

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .