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CVE-2021-20596

nvd nist
Published: Jul 22, 2021Modified: Jun 17, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

Description

NULL Pointer Dereference in MELSEC-F Series FX3U-ENET firmware version 1.14 and prior, FX3U-ENET-L firmware version 1.14 and prior and FX3U-ENET-P502 firmware version 1.14 and prior allows a remote unauthenticated attacker to cause a DoS condition in communication by sending specially crafted packets. Control by MELSEC-F series PLC is not affected and system reset is required for recovery.

Affected (3)

Mitsubishielectric
3 products
Fx3u Enet L Firmware
Fx3u Enet P502 Firmware
Fx3u Enet Firmware
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Fx3u Enet L Firmware
Up to 1.14
Fx3u Enet P502 Firmware
Up to 1.14
Fx3u Enet Firmware
Up to 1.14

Related CWEs

CWE-476
NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.

References (6)

Source: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp
PatchThird Party Advisory
Source: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp
Third Party Advisory
Source: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp
PatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchVendor Advisory

Timeline

No history available yet.