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CVE-2009-1920

34
FAUCET Score

CVE-2009-1920 is a critical remote code execution vulnerability affecting the JScript scripting engine (versions 5.1, 5.6, 5.7, 5.8) in Microsoft Windows, including various versions of Windows 2000, XP, Vista, and Server 2003/2008, primarily through Internet Explorer. This flaw, rated with a CVSS score of 9.3, allows unauthenticated attackers to execute arbitrary code by enticing a user to a crafted website, exploiting improper memory handling during script loading. Despite its high severity and potential for complete compromise (C:C/I:C/A:C), there is no evidence of active exploitation, public exploit code (Metasploit, ExploitDB, Nuclei), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:-:sp4:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:-:-:x32:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:-:-:x64:*:*:*:*:*

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
21.51%
Probability of exploitation in next 30 days
EPSS Percentile
97.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2151 is in the 88th percentile among its peer group of 8,918 CVEs.

Social Chatter

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

docs.microsoft.com / en-us/security-updates/securitybulletins/2009/ms09-045
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6316
us-cert.gov / cas/techalerts/TA09-251A.html
US Government Resource