CVE-2021-20600

5.9 mediumEPSS 2.4%

Medium (5.9) in mitsubishielectric r12ccpu-v firmware. EPSS 2.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.9 medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 2.4% chance of exploitation in the next 30 days; higher than 83% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2021-10-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mitsubishielectric:r12ccpu-v_firmware

References

https://jvn.jp/vu/JVNVU94914666/index.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-280-04
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-015_en.pdf
https://jvn.jp/vu/JVNVU94914666/index.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-280-04

Check your stack JSON