CVE-2026-32661
Guardianwall Mailsuite Remote Code Execution Vulnerability
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.
INFO
Published Date :
May 13, 2026, 6:16 a.m.
Last Modified :
May 13, 2026, 3:47 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-32661
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.0 | CRITICAL | ede6fdc4-6654-4307-a26d-3331c018e2ce | ||||
| CVSS 3.0 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.0 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | ede6fdc4-6654-4307-a26d-3331c018e2ce | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update GUARDIANWALL MailSuite and Mail Security Cloud.
- Review pop3wallpasswd configuration for pop3wallpasswd.
- Apply vendor patches when available.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-32661.
| URL | Resource |
|---|---|
| https://jvn.jp/en/jp/JVN35567473/ | |
| https://security-support.canon-its.jp/info_and_news/show/804?site_domain=GUARDIANWALL |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-32661 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-32661
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-32661 vulnerability anywhere in the article.
-
Daily CyberSecurity
CVSS 10 Alert: Quest KACE SMA Auth Bypass Exploited to Hijack Managed Endpoints
Detailed listing of tools and scripts within the exposed C2 directory | Image: Hunt Cybersecurity researchers have just dropped a report on a critical “management plane” threat that has spent the last ... Read more
-
Daily CyberSecurity
Nginx Releases Critical Update: Six Vulnerabilities Patched in New Stable Version
The web infrastructure world received a major wake-up call today as nginx-1.30.1 was released to address a suite of six security vulnerabilities. These flaws range from high-severity arbitrary code ex ... Read more
-
Daily CyberSecurity
Critical IKEv2 Buffer Overflow and CAS Bypass Hit Palo Alto PAN-OS
Palo Alto Networks has released a series of important security updates addressing multiple vulnerabilities across its PAN-OS software. The most alarming of these is a buffer overflow in IKEv2 processi ... Read more
The following table lists the changes that have been made to the
CVE-2026-32661 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 13, 2026
Action Type Old Value New Value Added Reference https://security-support.canon-its.jp/info_and_news/show/804?site_domain=GUARDIANWALL -
New CVE Received by [email protected]
May. 13, 2026
Action Type Old Value New Value 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-121 Added Reference https://jvn.jp/en/jp/JVN35567473/