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CVE-2003-1326

31
FAUCET Score

CVE-2003-1326 describes a critical cross-domain security bypass vulnerability in Microsoft Internet Explorer versions 5.5 and 6.0, allowing remote attackers to execute malicious scripts or arbitrary programs through dialog boxes. With a CVSS score of 7.5 and an EPSS percentile higher than 93% of all CVEs, this flaw presents a significant risk due to its low attack complexity and potential for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or public exploit code in Metasploit, Nuclei, or ExploitDB, the vulnerability has garnered substantial community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:a:microsoft:ie:6.0:sp1:*:*:*:*:*:*
5.0.1CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:5.0.1:*:*:*:*:*:*:*
5.0.1CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:5.0.1:sp1:*:*:*:*:*:*
5.0.1CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:5.0.1:sp2:*:*:*:*:*:*
5.0.1CPE matchmatch criteria
cpe:2.3:a:microsoft:internet_explorer:5.0.1:sp3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
16.33%
Probability of exploitation in next 30 days
EPSS Percentile
96.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1633 is in the 95th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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/2003/ms03-004
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A126
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A178
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A49
ciac.org / ciac/bulletins/n-038.shtml
iss.net / security_center/static/11258.php
Vendor Advisory
securityfocus.com / bid/6779