CVE-2026-32661CWE-121

Stack-based buffer overflow vulnerability exists in GUARDIANWALL MailSuite and GUARDIANWALL Mail Security Cloud (SaaS version)

Critical · published May 13, 2026

CVSS v4.0
9.3
EPSS
1%
Percentile
53.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
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
EPSS
0.00731 · 53.8th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-05-13T05:15Z
EPSS history
Timeline
  • 13 MAY 05:15Z
    Stack-based buffer overflow vulnerability exists in GUARDIANWALL MailSuite and GUARDIANWALL Mail Security Cloud (SaaS version)
    cvelistv5