High severity7.5NVD Advisory· Published Aug 23, 2021· Updated Jun 17, 2026
CVE-2020-36475
CVE-2020-36475
Description
An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). The calculations performed by mbedtls_mpi_exp_mod are not limited; thus, supplying overly large parameters could lead to denial of service when generating Diffie-Hellman key pairs.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
11- cpe:2.3:o:siemens:logo\!_cmr2020_firmware:*:*:*:*:*:*:*:*Range: <2.2
- cpe:2.3:o:siemens:logo\!_cmr2040_firmware:*:*:*:*:*:*:*:*Range: <2.2
- cpe:2.3:o:siemens:simatic_rtu3000c_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_rtu3030c_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_rtu3031c_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_rtu3041c_firmware:*:*:*:*:*:*:*:*
- Mbed TLS/Mbed TLSdescription
Patches
Vulnerability mechanics
References
6- cert-portal.siemens.com/productcert/pdf/ssa-756638.pdfnvdPatchThird Party Advisory
- github.com/ARMmbed/mbedtls/releases/tag/v2.16.9nvdRelease NotesThird Party Advisory
- github.com/ARMmbed/mbedtls/releases/tag/v2.25.0nvdRelease NotesThird Party Advisory
- github.com/ARMmbed/mbedtls/releases/tag/v2.7.18nvdRelease NotesThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/11/msg00021.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlnvdMailing ListThird Party Advisory
News mentions
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