VulnerabilityModified

CVE-2021-20610

HIGH 7.5EPSS 3.08%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (3.08%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric MELSEC iQ-R Series R00/01/02CPU, MELSEC iQ-R Series R04/08/16/32/120(EN)CPU, MELSEC iQ-R Series R08/16/32/120SFCPU, MELSEC iQ-R Series R08/16/32/120PCPU, MELSEC iQ-R Series R08/16/32/120PSFCPU, MELSEC iQ-R Series R16/32/64MTCPU, MELSEC iQ-R Series R12CCPU-V, MELSEC Q Series Q03UDECPU, MELSEC Q Series Q04/06/10/13/20/26/50/100UDEHCPU, MELSEC Q Series Q03/04/06/13/26UDVCPU, MELSEC Q Series Q04/06/13/26UDPVCPU, MELSEC Q Series Q12DCCPU-V, MELSEC Q Series Q24DHCCPU-V(G), MELSEC Q Series Q24/26DHCCPU-LS, MELSEC Q Series MR-MQ100, MELSEC Q Series Q172/173DCPU-S1, MELSEC Q Series Q172/173DSCPU, MELSEC Q Series Q170MCPU, MELSEC Q Series Q170MSCPU(-S1), MELSEC L Series L02/06/26CPU(-P), MELSEC L Series L26CPU-(P)BT and MELIPC Series MI5122-VW allows a remote unauthenticated attacker to cause a denial-of-service (DoS) condition by sending specially crafted packets. System reset is required for recovery.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 3.08% probability · 87th percentile
CISA KEV: Not listed
Weakness: CWE-130
Affected: mitsubishi/melsec iq-r r00 cpu firmware · mitsubishi/melsec iq-r r01 cpu firmware · mitsubishi/melsec iq-r r02 cpu firmware · mitsubishi/melsec iq-r r04 cpu firmware · mitsubishi/melsec iq-r r08 cpu firmware · mitsubishi/melsec iq-r r120 cpu firmware · mitsubishi/melsec iq-r r16 cpu firmware · mitsubishi/melsec iq-r r32 cpu firmware · mitsubishi/melsec iq-r r04 pcpu firmware · mitsubishi/melsec iq-r r08 pcpu firmware · mitsubishi/melsec iq-r r16 pcpu firmware · mitsubishi/melsec iq-r r32 pcpu firmware · mitsubishi/melsec iq-r r120 pcpu firmware · mitsubishi/melsec iq-r r08 sfcpu firmware · mitsubishi/melsec iq-r r16 sfcpu firmware · mitsubishi/melsec iq-r r32 sfcpu firmware · mitsubishi/melsec iq-r r120 sfcpu firmware · mitsubishi/melsec iq-r r16 mtcpu firmware · mitsubishi/melsec iq-r r32 mtcpu firmware · mitsubishi/melsec iq-r r64 mtcpu firmware · +35 more
Source: Mitsubishielectric.Psirt@yd.MitsubishiElectric.co.jp

References

https://jvn.jp/vu/JVNVU94434051/index.htmlThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02Third Party Advisory, US Government Resource
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdfVendor Advisory
https://jvn.jp/vu/JVNVU94434051/index.htmlThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-334-02Third Party Advisory, US Government Resource
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-019_en.pdfVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.