Vulnerability · Published Nov 25, 2025 · Assigned by jpcert
CVE-2025-62691
Critical 9.8
In plain English
A critical-severity stack buffer overflow in Security Point (Windows) of MaLion from Intercom, Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.0)9.8Critical
Exploit odds (30 days)0.7%top 45.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Security Point (Windows) of MaLion and MaLionCloud contains a stack-based buffer overflow vulnerability in processing HTTP headers. Receiving a specially crafted request from a remote unauthenticated attacker could lead to arbitrary code execution with SYSTEM privilege.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Intercom, Inc. | Security Point (Windows) of MaLion | prior to Ver.7.1.1.9 |
| Intercom, Inc. | Security Point (Windows) of MaLionCloud | prior to Ver.7.2.0.1 |
Weakness: CWE-121 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H