High severity · published Jun 8, 2021
CVE-2021-31340
A vulnerability has been identified in SIMATIC RF166C (All versions > V1.1 and < V1.3.2), SIMATIC RF185C (All versions > V1.1 and < V1.3.2), SIMATIC RF186C (All versions > V1.1…
7.5
CVSS
1%
EPSS
No
On KEV
Description
A vulnerability has been identified in SIMATIC RF166C (All versions > V1.1 and < V1.3.2), SIMATIC RF185C (All versions > V1.1 and < V1.3.2), SIMATIC RF186C (All versions > V1.1 and < V1.3.2), SIMATIC RF186CI (All versions > V1.1 and < V1.3.2), SIMATIC RF188C (All versions > V1.1 and < V1.3.2), SIMATIC RF188CI (All versions > V1.1 and < V1.3.2), SIMATIC RF360R (All versions < V2.0), SIMATIC Reader RF610R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF610R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF610R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF615R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF615R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF615R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF650R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF650R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF650R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF650R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF680R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF680R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF680R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF680R FCC (All versions > V3.0 < V4.0), SIMATIC Reader RF685R ARIB (All versions > V3.0 < V4.0), SIMATIC Reader RF685R CMIIT (All versions > V3.0 < V4.0), SIMATIC Reader RF685R ETSI (All versions > V3.0 < V4.0), SIMATIC Reader RF685R FCC (All versions > V3.0 < V4.0). Affected devices do not properly handle large numbers of incoming connections. An attacker may leverage this to cause a Denial-of-Service situation.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SR
Simatic Reader Rf610r Cmiit Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf610r Etsi Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf610r Fcc Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf615r Cmiit Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf615r Etsi Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf615r Fcc Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf650r Arib Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf650r Cmiit Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf650r Etsi Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf650r Fcc Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf680r Arib Firmware · Siemens
3.0 before 4.0 · source: NVD
SR
Simatic Reader Rf680r Cmiit Firmware · Siemens
3.0 before 4.0 · source: NVD
Affected product
SR
Simatic Reader Rf610r Cmiit Firmware
Siemens
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31340
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-31340
Mitigation
https://cert-portal.siemens.com/productcert/pdf/ssa-787292.pdf
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