High severity7.5NVD Advisory· Published Jul 1, 2021· Updated Jun 17, 2026
CVE-2021-27477
CVE-2021-27477
Description
When JTEKT Corporation TOYOPUC PLC versions PC10G-CPU, 2PORT-EFR, Plus CPU, Plus EX, Plus EX2, Plus EFR, Plus EFR2, Plus 2P-EFR, PC10P-DP, PC10P-DP-IO, Plus BUS-EX, Nano 10GX, Nano 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-P, Nano CPU, PC10P, and PC10GE receive an invalid frame, the outside area of a receive buffer for FL-net are overwritten. As a result, the PLC CPU detects a system error, and the affected products stop.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
24- JTEKT Corporation/TOYOPUC PLCdescription
- cpe:2.3:o:jtekt:pc10g-cpu_firmware:*:*:*:*:*:*:*:*Range: <3.91
- cpe:2.3:o:jtekt:2port-efr_firmware:*:*:*:*:*:*:*:*Range: <1.50
- cpe:2.3:o:jtekt:plus_cpu_firmware:*:*:*:*:*:*:*:*Range: <3.11
- cpe:2.3:o:jtekt:plus_ex_firmware:*:*:*:*:*:*:*:*Range: <3.11
- cpe:2.3:o:jtekt:plus_ex2_firmware:*:*:*:*:*:*:*:*Range: <3.11
- cpe:2.3:o:jtekt:plus_efr_firmware:*:*:*:*:*:*:*:*Range: <3.11
- cpe:2.3:o:jtekt:plus_efr2_firmware:*:*:*:*:*:*:*:*Range: <3.11
- cpe:2.3:o:jtekt:plus_2p-efr_firmware:*:*:*:*:*:*:*:*Range: <3.11
- cpe:2.3:o:jtekt:pc10p-dp_firmware:*:*:*:*:*:*:*:*Range: <1.50
- cpe:2.3:o:jtekt:pc10p-dp-io_firmware:*:*:*:*:*:*:*:*Range: <1.50
- cpe:2.3:o:jtekt:plus_bus-ex_firmware:*:*:*:*:*:*:*:*Range: <2.13
- cpe:2.3:o:jtekt:nano_10gx_firmware:*:*:*:*:*:*:*:*Range: <3.00
- cpe:2.3:o:jtekt:nano_2et_firmware:*:*:*:*:*:*:*:*Range: <2.40
- cpe:2.3:o:jtekt:pc10pe_firmware:*:*:*:*:*:*:*:*Range: <1.02
- cpe:2.3:o:jtekt:pc10pe-16\/16p_firmware:*:*:*:*:*:*:*:*Range: <1.02
- cpe:2.3:o:jtekt:pc10e_firmware:*:*:*:*:*:*:*:*Range: <1.02
- cpe:2.3:o:jtekt:fl\/et-t-v2h_firmware:*:*:*:*:*:*:*:*Range: <f2.8_e1.5
- cpe:2.3:o:jtekt:pc10b_firmware:*:*:*:*:*:*:*:*Range: <1.11
- cpe:2.3:o:jtekt:pc10b-p_firmware:*:*:*:*:*:*:*:*Range: <1.11
- cpe:2.3:o:jtekt:nano_cpu_firmware:*:*:*:*:*:*:*:*Range: <2.08
- cpe:2.3:o:jtekt:pc10p_firmware:*:*:*:*:*:*:*:*Range: <1.05
- cpe:2.3:o:jtekt:pc10ge_firmware:*:*:*:*:*:*:*:*Range: <1.04
Patches
Vulnerability mechanics
References
1- us-cert.cisa.gov/ics/advisories/icsa-21-180-04nvdThird Party AdvisoryUS Government Resource
News mentions
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