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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
MitsubishiCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 67%
VendorProductVersion
mitsubishielectricfx3u-enet-l_firmware
𝑥
≤ 1.14
mitsubishielectricfx3u-enet-p502_firmware
𝑥
≤ 1.14
mitsubishielectricfx3u-enet_firmware
𝑥
≤ 1.14
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://jvn.jp/vu/JVNVU94348759/index.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf
https://jvn.jp/vu/JVNVU94348759/index.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-201-01
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdf