Medium severity5.9NVD Advisory· Published Oct 8, 2021· Updated Jun 17, 2026
CVE-2021-20600
CVE-2021-20600
Description
Uncontrolled resource consumption in Mitsubishi Electric MELSEC iQ-R series C Controller Module R12CCPU-V Firmware Versions "16" and prior allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending a large number of packets in a short time while the module starting up. System reset is required for recovery.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:o:mitsubishielectric:r12ccpu-v_firmware:*:*:*:*:*:*:*:*Range: <=16
- Mitsubishi Electric/MELSEC iQ-R series C Controller Module R12CCPU-V Firmwaredescription
- Range: <=16
Patches
Vulnerability mechanics
References
3- jvn.jp/vu/JVNVU94914666/index.htmlnvdThird Party Advisory
- us-cert.cisa.gov/ics/advisories/icsa-21-280-04nvdThird Party AdvisoryUS Government Resource
- www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-015_en.pdfnvdVendor Advisory
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