CVEvulnerability

CVE-2021-20596

7.5 HIGH Published 2021-07-22 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-07-22
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
Weaknesses
CWE-476

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 configurations

• mitsubishielectric fx3u-enet-l firmware (<= 1.14) • mitsubishielectric fx3u-enet-p502 firmware (<= 1.14) • mitsubishielectric fx3u-enet firmware (<= 1.14)

Related

Weakness · CWE (1)

  • CWE-476 NULL Pointer Dereference weakness

References