CVE-2026-32661

Stack Buffer Overflow in GUARDIANWALL MailSuite Web Service Enables Remote Code Execution

Published May 13, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
Stack-based buffer overflow vulnerability exists in GUARDIANWALL MailSuite and GUARDIANWALL Mail Security Cloud (SaaS version). If a remote attacker sends a specially crafted request to the product's web service, arbitrary code may be executed when the product is configured to run pop3wallpasswd with grdnwww user privilege.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Canon Marketing Japan
Canon Marketing Japan guardianwall Mail Security Cloud (saas Version)
Canon Marketing Japan guardianwall Mailsuite (on-premises Version)
Vendors & Products Canon Marketing Japan
Canon Marketing Japan guardianwall Mail Security Cloud (saas Version)
Canon Marketing Japan guardianwall Mailsuite (on-premises Version)
Type Values Removed Values Added
Title Stack Buffer Overflow in GUARDIANWALL MailSuite Web Service Enables Remote Code Execution
Type Values Removed Values Added
Description Stack-based buffer overflow vulnerability exists in GUARDIANWALL MailSuite and GUARDIANWALL Mail Security Cloud (SaaS version). If a remote attacker sends a specially crafted request to the product's web service, arbitrary code may be executed when the product is configured to run pop3wallpasswd with grdnwww user privilege.
Weaknesses CWE-121
References
Metrics cvssV3_0

{'score': 9.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
jpcert
Published
Updated
May 13, 2026, 10:49 AM
Reserved
May 11, 2026, 12:11 AM
Status
Deferred
Published
May 13, 2026, 6:16 AM
Modified
Oct 26, 2026, 2:10 PM