Unrated severityNVD Advisory· Published Jul 22, 2021· Updated Aug 3, 2024

CVE-2021-20596

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

MELSEC-F Series/MELSEC-F Series FX3U-ENET firmwaredescription
Mitsubishielectric/FX3U-ENETllm-create
Range: <=1.14

Patches

Vulnerability mechanics

References

jvn.jp/vu/JVNVU94348759/index.htmlmitrex_refsource_MISC
us-cert.cisa.gov/ics/advisories/icsa-21-201-01mitrex_refsource_MISC
www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-006_en.pdfmitrex_refsource_MISC

News mentions

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