CVE-2026-22320

A stack-based buffer overflow in the CLI's TFTP file‑transfer command handling allows a low-privileged attacker with Telnet/SSH access to trigger memory corruption by supplying unexpected or oversized filename input. Exploitation results in the corruption of the internal buffer, causing the CLI and web dashboard to become unavailable and leading to a denial of service.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://certvde.com/de/advisories/VDE-2025-104

Configurations

No configuration.

History

17 Jun 2026, 10:19

Type	Values Removed	Values Added
Summary		(es) Un desbordamiento de búfer basado en pila en el manejo del comando de transferencia de archivos TFTP de la CLI permite a un atacante con privilegios bajos con acceso Telnet/SSH activar la corrupción de memoria al proporcionar una entrada de nombre de archivo inesperada o sobredimensionada. La explotación resulta en la corrupción del búfer interno, haciendo que la CLI y el panel web dejen de estar disponibles y provocando una denegación de servicio.

18 Mar 2026, 08:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-18 08:16

Updated : 2026-06-17 10:19

NVD link : CVE-2026-22320

Mitre link : CVE-2026-22320

CVE.ORG link : CVE-2026-22320

JSON object : View

Products Affected

No product.

CWE

CWE-121

Stack-based Buffer Overflow

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"defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH 2316/K1", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH 2506-2SFP/K1", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH 2508/K1", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH TSN 2316", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH TSN 2312-2GC-2SFP", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH TSN 2314-2SFP", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH 5924-4GC", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH 5916-8GC-4SFP+", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH 5924SFP-4GC", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH 5924-4SFP+", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Phoenix Contact", "product": "FL SWITCH 5916SFP-8GC-4SFP+", "versions": [{"status": "affected", "version": "0.0.0", "lessThan": "3.53", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-03-18T08:16:29.017", "references": [{"url": "https://certvde.com/de/advisories/VDE-2025-104", "source": "info@cert.vde.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "info@cert.vde.com", "description": [{"lang": "en", "value": "CWE-121"}]}], "descriptions": [{"lang": "en", "value": "A stack-based buffer overflow in the CLI's TFTP file\u2011transfer command handling allows a low-privileged attacker with Telnet/SSH access to trigger memory corruption by supplying unexpected or oversized filename input. Exploitation results in the corruption of the internal buffer, causing the CLI and web dashboard to become unavailable and leading to a denial of service."}, {"lang": "es", "value": "Un desbordamiento de b\u00fafer basado en pila en el manejo del comando de transferencia de archivos TFTP de la CLI permite a un atacante con privilegios bajos con acceso Telnet/SSH activar la corrupci\u00f3n de memoria al proporcionar una entrada de nombre de archivo inesperada o sobredimensionada. La explotaci\u00f3n resulta en la corrupci\u00f3n del b\u00fafer interno, haciendo que la CLI y el panel web dejen de estar disponibles y provocando una denegaci\u00f3n de servicio."}], "lastModified": "2026-06-17T10:19:43.117", "sourceIdentifier": "info@cert.vde.com"}