Which products and versions are affected by CVE-2003-0264?

Affected: Slmail (Seattle Lab Software) versions 5.1.0.4420. The full list is in the CVE brief.

Is CVE-2003-0264 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2003-0264 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2003-0264?

Public exploit code is available.

Is there a fix for CVE-2003-0264?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2003-0264 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2003-0264

HighPublic exploit

Multiple buffer overflows in SLMail 5.1.0.4420 allows remote attackers to execute arbitrary code via (1) a long EHLO argument to slmail.exe, (2) a long XTRN argument to slmail.exe, (3) a long string to POPPASSWD, or (4) a long password to the POP3 server.

Published May 27, 2003 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2003-0264 is a high-severity vulnerability (CVSS 7.5 v2) affecting Slmail (Seattle Lab Software).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 72% 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)

72%

Higher than 99.4% 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

Get the full CVE-2003-0264 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
SlmailSeattle Lab Software	5.1.0.4420	n/a

Timeline

Publicly disclosed
May 27, 2003
Last updated
Apr 15, 2026

References

patchhttp://www.nextgenss.com/advisories/slmail-vulns.txt
exploitMSF seattlelab_pass.rb
exploitExploitDB-16399
exploitExploitDB-638
exploitExploitDB-643

4 more references in the full CVE brief

FAQ

Common Questions.

Multiple buffer overflows in SLMail 5.1.0.4420 allows remote attackers to execute arbitrary code via (1) a long EHLO argument to slmail.exe, (2) a long XTRN argument to slmail.exe, (3) a long string to POPPASSWD, or (4) a long password to the POP3 server.
Affected: Slmail (Seattle Lab Software) versions 5.1.0.4420. 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.

Is CVE-2003-0264 Running On Your Attack Surface?

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