High severity7.5NVD Advisory· Published Feb 3, 2022· Updated Aug 11, 2026
CVE-2020-5953
CVE-2020-5953
Description
A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
24cpe:2.3:a:insyde:insydeh2o:5.12.09.0074:*:*:*:*:*:*:*+ 5 more
- cpe:2.3:a:insyde:insydeh2o:5.12.09.0074:*:*:*:*:*:*:*
- cpe:2.3:a:insyde:insydeh2o:5.23.04.0045:*:*:*:*:*:*:*
- cpe:2.3:a:insyde:insydeh2o:5.23.45.0023:*:*:*:*:*:*:*
- cpe:2.3:a:insyde:insydeh2o:5.33.15.0034:*:*:*:*:*:*:*
- cpe:2.3:a:insyde:insydeh2o:5.34.03.0029:*:*:*:*:*:*:*
- cpe:2.3:a:insyde:insydeh2o:5.42.03.0010:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_field_pg_m6_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc127e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc227g_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc277g_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc327g_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc377g_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc427e_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:siemens:simatic_ipc477e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc477e_pro_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc627e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc647e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc677e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_ipc847e_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:siemens:simatic_itp1000_firmware:-:*:*:*:*:*:*:*
- InsydeH2O/UEFI Firmwaredescription
Patches
Vulnerability mechanics
References
6- cert-portal.siemens.com/productcert/pdf/ssa-306654.pdfnvdThird Party Advisory
- security.netapp.com/advisory/ntap-20220222-0005/nvdThird Party Advisory
- www.insyde.com/productsnvdProductVendor Advisory
- www.insyde.com/security-pledgenvdVendor Advisory
- cert-portal.siemens.com/productcert/html/ssa-306654.htmlnvd
- www.kb.cert.org/vuls/id/796611nvd
News mentions
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