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CVE-2007-0043

38
FAUCET Score

CVE-2007-0043 is a critical vulnerability affecting the Just In Time (JIT) Compiler service in Microsoft .NET Framework versions 1.0, 1.1, and 2.0 across Windows 2000, XP, Server 2003, and Vista. This flaw, likely an unchecked buffer overflow, allows user-assisted remote attackers to execute arbitrary code. With a CVSS score of 9.3 (Critical), it presents a high risk due to its network-based attack vector, medium attack complexity, and complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:1.0:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:1.1:*:*:*:*:*:*:*
2.0CPE matchmatch criteria
cpe:2.3:a:microsoft:.net_framework:2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
30.67%
Probability of exploitation in next 30 days
EPSS Percentile
98.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.3067 is in the 93rd percentile among its peer group of 8,918 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media 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

Remediation records are not available for this CVE.

References

archive.cert.uni-stuttgart.de / bugtraq/2007/07/msg00254.html
osvdb.org / 35956
docs.microsoft.com / en-us/security-updates/securitybulletins/2007/ms07-040
secunia.com / advisories/26003
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/34639
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1873
securityfocus.com / bid/24811
securitytracker.com / id
us-cert.gov / cas/techalerts/TA07-191A.html
US Government Resource
vupen.com / english/advisories/2007/2482
Vendor Advisory