CVE-2011-1271 is a JIT optimization vulnerability in Microsoft .NET Framework versions 3.5 Gold, SP1, 3.5.1, and 4.0, affecting various Windows operating systems. This flaw allows context-dependent attackers to bypass access restrictions and execute arbitrary code by leveraging crafted applications that exploit improper handling of null string expressions. With a CVSS score of 7.7 (HIGH), it presents a significant risk due to its network-based attack vector and high impact on confidentiality and integrity, despite requiring high attack complexity. While not listed in CISA's KEV catalog, public exploit code exists (EDB-35740), though there is no evidence of active exploitation, Metasploit/Nuclei modules, or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
4.0CPE matchmatch criteria | cpe:2.3:a:microsoft:.net_framework:4.0:*:*:*:*:*:*:* | ||
3.5.1CPE matchmatch criteria | cpe:2.3:a:microsoft:.net_framework:3.5.1:*:*:*:*:*:*:* | ||
2.0CPE matchmatch criteria | cpe:2.3:a:microsoft:.net_framework:2.0:sp2:*:*:*:*:*:* | ||
3.5CPE matchmatch criteria | cpe:2.3:a:microsoft:.net_framework:3.5:sp1:*:*:*:*:*:* | ||
2.0CPE matchmatch criteria | cpe:2.3:a:microsoft:.net_framework:2.0:sp1:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:H/Au:N/C:P/I:P/A:P
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.