Stack-based buffer overflow in Canon Marketing Japan Inc. GUARDIANWALL MailSuite
Priority MEDIUM 48CWE-121Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00472 41st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Canon Marketing Japan Inc. | GUARDIANWALL MailSuite (On-premises version) | Ver 1.4.00 to Ver 2.4.26 | — | No fix listed | CNA |
| Canon Marketing Japan Inc. | GUARDIANWALL Mail Security Cloud (SaaS version) | versions before the maintenance on April 30; 2026 | — | No fix listed | CNA |
- GUARDIANWALL MailSuite (On-premises version) VendorCanon Marketing Japan Inc. Affected Ver 1.4.00 to Ver 2.4.26 Fixed in — No fix listed CNA
- GUARDIANWALL Mail Security Cloud (SaaS version) VendorCanon Marketing Japan Inc. Affected versions before the maintenance on April 30; 2026 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-32661
- 2026-10-03 Alias added: GHSA-hrhg-9hfh-hwhj
- 2026-10-25 EPSS moved to the below the 50th percentile
References
Sources
- CVE-2026-32661 · CVE Program
- CVE-2026-32661 · NVD
- FIRST EPSS
- GHSA-hrhg-9hfh-hwhj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences