Heap-based buffer overflow in Intercom, Inc. Security Point of MaLion
Priority MEDIUM 43CWE-122Published · 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-122 and the CVSS impact.
Summary
Security Point (Windows) of MaLion and MaLionCloud contains a heap-based buffer overflow vulnerability in processing Content-Length. Receiving a specially crafted request from a remote unauthenticated attacker could lead to arbitrary code execution with SYSTEM privilege.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00736 54th 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
- No
- 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 |
|---|---|---|---|---|---|
| Intercom, Inc. | Security Point (Windows) of MaLion | prior to Ver.7.1.1.9 | — | No fix listed | CNA |
| Intercom, Inc. | Security Point (Windows) of MaLionCloud | prior to Ver.7.2.0.1 | — | No fix listed | CNA |
- Security Point (Windows) of MaLion VendorIntercom, Inc. Affected prior to Ver.7.1.1.9 Fixed in — No fix listed CNA
- Security Point (Windows) of MaLionCloud VendorIntercom, Inc. Affected prior to Ver.7.2.0.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-64693
- 2026-10-03 Alias added: GHSA-29fx-phpp-3hmg
References
More Intercom, Inc. vulnerabilities
- TI-2017-07918 Improper authentication in Intercom, Inc. MaLion for Windows and Mac CVSS 3.1CRITICAL 9.8
- TI-2017-07919 Hard-coded credentials in Intercom, Inc. MaLion for Windows and Mac CVSS 3.1CRITICAL 9.8
- TI-2017-07917 SQL injection in Intercom, Inc. MaLion for Windows and Mac CVSS 3.1CRITICAL 9.8
- TI-2025-38883 Stack-based buffer overflow in Intercom, Inc. Security Point of MaLion CVSS 4.0CRITICAL 9.3
- TI-2017-07916 Improper authentication in Intercom, Inc. MaLion for Windows CVSS 3.0HIGH 8.1
- TI-2019-10708 The Intercom plugin through 1.2.1 for WordPress leaks a Slack Access Token in source code. CVSS 3.1HIGH 7.5
Sources
- CVE-2025-64693 · CVE Program
- CVE-2025-64693 · NVD
- FIRST EPSS
- GHSA-29fx-phpp-3hmg · GitHub Advisory Database · CC BY 4.0
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