Fortinet
CVE-2026-22627
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessCraft malicious LLDP packet
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ExploitSend packet on adjacent network
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ExecutionOverflow buffer in LLDP parser
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ImpactExecute arbitrary code on device
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Buffer copy size validation
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Device must be on the same adjacent network segment (not routed); vulnerable Fortinet FortiSwitchAX versions 1.0.0-1.0.1; LLDP packet processing enabled (default state). |
| Impact | CVSS 8.8 (HIGH). Attack vector: Adjacent Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitation no authentication required. Exploitable via remote/network. |
| Exploit ScenarioDerived | A remote attacker without authentication could exploit this vulnerability to an unauthenticated attacker within the same adjacent network to execute unauthor. |
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Alert meAnalysisAIv1 – Mar 12, 2026
vulnerability in Fortinet FortiSwitchAXFixed 1.0.0 versions up to 1.0.1 is affected by classic buffer overflow (CVSS 8.8).
RemediationAI
Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability (CWE-120: Classic Buffer Overflow) affects vulnerability in Fortinet FortiSwitchAXFixed 1.0.0. A buffer copy without checking size of input ('classic buffer overflow') vulnerability in Fortinet FortiSwitchAXFixed 1.0.0 through 1.0.1 may allow an unauthenticated attacker within the same adjacent network to execute unauthorized code or commands on the device via sending a crafted LLDP packet.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
A buffer copy without checking size of input ('classic buffer overflow') vulnerability in Fortinet FortiSwitchAXFixed 1.0.0 through 1.0.1 may allow an unauthenticated attacker within the same adjacent network to execute unauthorized code or commands on the device via sending a crafted LLDP packet.
Executive ViewAI
A critical buffer overflow vulnerability (CVE-2026-22627) affects Fortinet FortiSwitchAX versions 1.0.0-1.0.1, allowing remote attackers to execute arbitrary code with a CVSS score of 8.8. Organizations running vulnerable FortiSwitch devices are at immediate risk of network compromise, data exfiltration, and operational disruption. No vendor patch is currently available, requiring immediate risk mitigation while awaiting a security update.
Implement network segmentation to isolate affected FortiSwitch devices; restrict management access via ACLs and VPN; enable enhanced logging and IDS/IPS signatures for buffer overflow detection; disable unnecessary features/protocols if operationally feasible; monitor vendor advisories closely for patch availability; consider temporary replacement with alternative network switching infrastructure if risk tolerance is low.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Affected Products (CPE)CVE.org
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GitHub PoC
Exploit-DB