NULL pointer dereference in Mitsubishielectric Fx3u-Enet Firmware
CVE-2021-20596
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.
EPSS: 0.022 (80.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Mitsubishielectric Fx3u-enet_firmware
- Mitsubishielectric Fx3u-enet-l_firmware
- Mitsubishielectric Fx3u-enet-p502_firmware
- N/a Melsec-f Series Fx3u-enet; Fx3u-enet-l; Fx3u-enet-p502 — versions Firmware version 1.14 and prior
Weakness classification (CWE)
References
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (Patch, x_refsource_MISC, Vendor Advisory)
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (Patch, Third Party Advisory, x_refsource_MISC)
- Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-20596?
- CVE-2021-20596 is a high-severity vulnerability in Mitsubishielectric Fx3u-Enet Firmware, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-07-22.
- How severe is CVE-2021-20596?
- High severity. CVSS v3 base score is 7.5 out of 10.