Medium severity · published Aug 6, 2021
CVE-2021-20598
Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R08/16/32/120SFCPU all versions, R08/16/32/120PSFCPU all…
5.3
CVSS
1.5%
EPSS
No
On KEV
Description
Overly Restrictive Account Lockout Mechanism vulnerability in Mitsubishi Electric MELSEC iQ-R series CPU modules (R08/16/32/120SFCPU all versions, R08/16/32/120PSFCPU all versions) allows a remote unauthenticated attacker to lockout a legitimate user by continuously trying login with incorrect password.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 74% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RF
R08psfcpu Firmware · Mitsubishielectric
All versions, or not specified · source: NVD
RF
R08sfcpu Firmware · Mitsubishielectric
All versions, or not specified · source: NVD
RF
R120psfcpu Firmware · Mitsubishielectric
All versions, or not specified · source: NVD
RF
R120sfcpu Firmware · Mitsubishielectric
All versions, or not specified · source: NVD
RF
R16psfcpu Firmware · Mitsubishielectric
All versions, or not specified · source: NVD
RF
R16sfcpu Firmware · Mitsubishielectric
All versions, or not specified · source: NVD
RF
R32psfcpu Firmware · Mitsubishielectric
All versions, or not specified · source: NVD
RF
R32sfcpu Firmware · Mitsubishielectric
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20598
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20598
Third Party Advisory
https://jvn.jp/vu/JVNVU98578731/index.html
Vendor Advisory
https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-010_en.pdf
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