CVE-2025-25249: Fortinet Multiple Products Heap-based Buffer Overflow Vulnerability
Summary
A heap-based buffer overflow vulnerability has been identified in multiple Fortinet products, including FortiOS, FortiSwitchManager, and FortiSASE. This flaw allows attackers to execute unauthorized code or commands by sending specially crafted packets.
IFF Assessment
This vulnerability allows for unauthorized code execution, which is a significant threat to defenders.
Severity
CISA KEV: Listed as actively exploited. Federal patch due: September 12, 2026. Known ransomware use: Unknown.
Defender Context
This vulnerability in widely used Fortinet products poses a significant risk. Defenders should prioritize patching and mitigation efforts as outlined by CISA, paying close attention to asset exposure and CISA's guidance on risk-based security updates. The possibility of ransomware exploiting this flaw, even if currently unknown, highlights the urgency.