CVE-2021-37172
A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.92%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A vulnerability has been identified in SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (V4.5.0). Affected devices fail to authenticate against configured passwords when provisioned using TIA Portal V13. This could allow an attacker using TIA Portal V13 or later versions to bypass authentication and download arbitrary programs to the PLC. The vulnerability does not occur when TIA Portal V13 SP1 or any later version was used to provision the device.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 0.92% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-287
- Affected
- siemens/simatic s7-1200 cpu firmware · siemens/simatic step 7 \(tia portal\)
- Source
- productcert@siemens.com
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdfPatch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdfPatch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.