Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2020-5955


An issue was discovered in Int15MicrocodeSmm in Insyde InsydeH2O before 2021-10-14 on Intel client chipsets. A caller may be able to escalate privileges.


Security Impact Summary

This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 21 products from insyde, from intel, from intel and 18 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2021-11-03T01:15:06.930

Last Modified

2024-11-21T05:34:53.753

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

6.4

Weaknesses
  • Type: Primary
    NVD-CWE-noinfo

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System insyde insydeh2o_uefi_bios < 05.32.30.0001 Yes
Hardware intel ice_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.41.35.0001 Yes
Hardware intel tiger_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.42.11.0026 Yes
Hardware intel whitley-sp - No
Operating System insyde insydeh2o_uefi_bios < 05.04.21.0068 Yes
Hardware intel grantley-ep - No
Operating System insyde insydeh2o_uefi_bios < 05.42.09.0003 Yes
Hardware intel elkhart_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.21.51.0040 Yes
Hardware intel purley-ep_refresh_neon_city - No
Operating System insyde insydeh2o_uefi_bios < 05.34.09.0030 Yes
Hardware intel comet_lake_rvp - No
Operating System insyde insydeh2o_uefi_bios < 05.34.09.0030 Yes
Hardware intel comet_lake_rvp - No
Operating System insyde insydeh2o_uefi_bios < 05.32.47.0001 Yes
Hardware intel comet_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.23.45.0023 Yes
Hardware intel whiskey_lake_rvp - No
Operating System insyde insydeh2o_uefi_bios < 05.23.45.0023 Yes
Hardware intel whiskey_lake_rvp - No
Operating System insyde insydeh2o_uefi_bios < 05.21.43.0001 Yes
Hardware intel whiskey_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.23.04.0045 Yes
Hardware intel mehlow - No
Operating System insyde insydeh2o_uefi_bios < 05.23.04.0045 Yes
Hardware intel mehlow-r - No
Operating System insyde insydeh2o_uefi_bios < 05.23.04.0045 Yes
Hardware intel mehlow-r - No
Operating System insyde insydeh2o_uefi_bios < 05.23.04.0045 Yes
Hardware intel mehlow - No
Operating System insyde insydeh2o_uefi_bios < 05.21.43.0001 Yes
Hardware intel coffee_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.21.43.0001 Yes
Hardware intel cannon_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.11.26.0015 Yes
Hardware intel kaby_lake_mrd - No
Operating System insyde insydeh2o_uefi_bios < 05.12.09.0075 Yes
Hardware intel greenlow - No
Operating System insyde insydeh2o_uefi_bios < 05.12.09.0075 Yes
Hardware intel greenlow-r - No
Operating System insyde insydeh2o_uefi_bios < 05.12.09.0075 Yes
Hardware intel greenlow - No
Operating System insyde insydeh2o_uefi_bios < 05.12.09.0075 Yes
Hardware intel greenlow-r - No
Operating System insyde insydeh2o_uefi_bios < 05.10.48.0001 Yes
Hardware intel kaby_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.05.39.0001 Yes
Hardware intel skylake_mrd - No
Operating System insyde insydeh2o_uefi_bios < 05.04.15.0001 Yes
Hardware intel skylake - No
Operating System insyde insydeh2o_uefi_bios < 05.23.27.0001 Yes
Hardware intel coffee_lake - No
Operating System insyde insydeh2o_uefi_bios < 05.23.27.0001 Yes
Hardware intel whiskey_lake - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For insyde's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.