CVE-2026-32661

CVSS 9.3 CRITICALEPSS 0.5%CWE-121

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.3EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

13 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

Canon Marketing Japan Inc. · GUARDIANWALL Mail Security Cloud (SaaS version)Canon Marketing Japan Inc. · GUARDIANWALL MailSuite (On-premises version)

References

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