CVE-2004-0363
HighPublic exploitStack-based buffer overflow in the SymSpamHelper ActiveX component (symspam.dll) in Norton AntiSpam 2004, as used in Norton Internet Security 2004, allows remote attackers to execute arbitrary code via a long parameter to the LaunchCustomRuleWizard method.
Published Apr 15, 2004 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2004-0363 is a high-severity vulnerability (CVSS 7.5 v2) affecting Norton Antispam (Symantec).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 67% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
67%
Higher than 99.2% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
Stack-based buffer overflow in the SymSpamHelper ActiveX component (symspam.dll) in Norton AntiSpam 2004, as used in Norton Internet Security 2004, allows remote attackers to execute arbitrary code via a long parameter to the LaunchCustomRuleWizard method.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Norton AntispamSymantec | 2004 | n/a |
Timeline
Publicly disclosed
Apr 15, 2004
Last updated
Apr 15, 2026
References
- advisory9916
- patchhttp://www.nextgenss.com/advisories/antispam.txt
- exploitMSF nis2004_antispam.rb
- exploitExploitDB-16595
- other20040319 Norton AntiSpam Remote Buffer Overrun (#NISR19042004a)
FAQ
Common Questions.
Stack-based buffer overflow in the SymSpamHelper ActiveX component (symspam.dll) in Norton AntiSpam 2004, as used in Norton Internet Security 2004, allows remote attackers to execute arbitrary code via a long parameter to the LaunchCustomRuleWizard method.
Affected: Norton Antispam (Symantec) versions 2004. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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