A heap-based buffer overflow vulnerability in the processing of Link Control Protocol messages in FortiGate versions 5.6.12, 6.0.10, 6.2.4 and 6.4.1 and earlier may allow a remote attacker with valid SSL VPN credentials to crash the SSL VPN daemon by sending a large LCP packet, when tunnel mode is enabled. Arbitrary code execution may be theoretically possible, albeit practically very difficult to achieve in this context
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesLow
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityNone
IntegrityLow
AvailabilityLow
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.6 |
Affected Software
| Vendor | Product | Version |
|---|
| Fortinet | FortiOS | ≥ 6.4.0, ≤ 6.4.1 |
| Fortinet | FortiOS | ≥ 6.0.0, ≤ 6.0.10 |
| Fortinet | FortiOS | ≥ 5.6.0, ≤ 5.6.12 |
| Fortinet | FortiOS | ≥ 6.2.0, ≤ 6.2.4 |
| fortinet | fortios | ≥ 6.2.0, < 6.2.5 |
| fortinet | fortios | ≥ 6.4.0, < 6.4.2 |
| fortinet | fortios | ≥ 6.0.0, < 6.0.11 |
| fortinet | fortios | < 5.6.13 |
Published: 2024-12-19
