What’s Vulnerable › Vulnerabilities

CVE-2020-13238

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-10 · updated 2026-06-17
• Weakness: CWE-400

Description

Mitsubishi MELSEC iQ-R Series PLCs with firmware 33 allow attackers to halt the industrial process by sending an unauthenticated crafted packet over the network, because this denial of service attack consumes excessive CPU time. After halting, physical access to the PLC is required in order to restore production.

Affected products

• Mitsubishielectric Melsec Iq-R00Cpu Firmware: through 7
• Mitsubishielectric Melsec Iq-R01Cpu Firmware: through 7
• Mitsubishielectric Melsec Iq-R02Cpu Firmware: through 7
• Mitsubishielectric Melsec Iq-R04Cpu Firmware: through 39
• Mitsubishielectric Melsec Iq-R08Cpu Firmware: through 39
• Mitsubishielectric Melsec Iq-R08Fcpu Firmware: through 20
• Mitsubishielectric Melsec Iq-R08Pcpu Firmware: all versions
• Mitsubishielectric Melsec Iq-R08Sfcpu Firmware: all versions
• Mitsubishielectric Melsec Iq-R120Cpu Firmware: through 39
• Mitsubishielectric Melsec Iq-R120Fcpu Firmware: through 20
• Mitsubishielectric Melsec Iq-R120Pcpu Firmware: all versions
• Mitsubishielectric Melsec Iq-R120Sfcpu Firmware: all versions
• Mitsubishielectric Melsec Iq-R16Cpu Firmware: through 39
• Mitsubishielectric Melsec Iq-R16Fcpu Firmware: through 20
• Mitsubishielectric Melsec Iq-R16Pcpu Firmware: all versions
• Mitsubishielectric Melsec Iq-R16Sfcpu Firmware: all versions
• Mitsubishielectric Melsec Iq-R32Cpu Firmware: through 39
• Mitsubishielectric Melsec Iq-R32Fcpu Firmware: through 20
• Mitsubishielectric Melsec Iq-R32Pcpu Firmware: all versions
• Mitsubishielectric Melsec Iq-R32Sfcpu Firmware: all versions
• Mitsubishielectric Melsec Iq-Rj71En71 Firmware: all versions

References

• http://jvn.jp/vu/JVNVU97662844/index.html
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-001_en.pdf
• https://www.us-cert.gov/ics/advisories/icsa-20-161-02
• http://jvn.jp/vu/JVNVU97662844/index.html
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-001_en.pdf
• https://www.us-cert.gov/ics/advisories/icsa-20-161-02

Get alerted when CVE-2020-13238 or the next vulnerability affects your stack