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CVE-2008-5543

24
FAUCET Score

CVE-2008-5543 describes a critical vulnerability in Symantec AntiVirus (SAV) 10, specifically when used with Internet Explorer 6 or 7. This flaw allows remote attackers to bypass malware detection in HTML documents by prepending an MZ header and manipulating the file extension (e.g., no extension, .txt, or .jpg). With a CVSS score of 9.3, this vulnerability is highly severe, indicating a network-based attack with medium complexity that could lead to complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no evidence of active exploitation, nor is exploit code publicly available in common repositories like Metasploit or ExploitDB, and it has garnered minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
10.0CPE matchmatch criteria
cpe:2.3:a:symantec:antivirus:10.0:*:*:*:*:*:*:*

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
2.95%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0295 is in the 44th percentile among its peer group of 8,920 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

securityreason.com / securityalert/4723
exchange.xforce.ibmcloud.com / vulnerabilities/47435
securityfocus.com / archive/1/498995/100/0/threaded
securityfocus.com / archive/1/499043/100/0/threaded