What’s Vulnerable › Vulnerabilities

CVE-2026-32661

• Severity: critical (CVSS 9.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-13 · updated 2026-10-26
• Weakness: CWE-121

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.

Affected products

• Canon Marketing Japan Inc. GUARDIANWALL Mail Security Cloud (SaaS version): versions before the maintenance on April 30, 2026
• Canon Marketing Japan Inc. GUARDIANWALL MailSuite (On-premises version): from Ver 1.4.00 through Ver 2.4.26

References

• https://jvn.jp/en/jp/JVN35567473/
• https://security-support.canon-its.jp/info_and_news/show/804?site_domain=GUARDIANWALL

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