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CVE Record

CVE-2020-5955: An issue was discovered in Int15MicrocodeSmm in Insyde InsydeH2O before 2021-10-14 on Intel client chipsets.

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2020-5955 is a privilege escalation issue in InsydeH2O firmware on Intel client chipsets before 2021-10-14. Firmware issues can matter operationally because remediation often depends on OEM BIOS updates. The provided sources do not include a CVSS score, known exploitation, or specific affected device models.

Executive priority

Set priority after asset confirmation. If affected systems are present, handle through normal firmware risk governance because privilege escalation in firmware can be difficult to detect and patching may require maintenance windows.

Technical view

The CVE describes caller privilege escalation in Int15MicrocodeSmm, an InsydeH2O firmware component. The source bundle does not provide CWE, CVSS, exploit details, or product-level affected CPEs. Exposure assessment depends on confirming whether deployed systems use affected InsydeH2O firmware builds on Intel client chipsets.

Likely exposure

Likely exposure is limited to systems whose OEM firmware incorporates affected InsydeH2O builds before 2021-10-14 on Intel client chipsets. The provided affected-product data is n/a, so model-level exposure cannot be confirmed from this bundle alone.

Exploitation context

The bundle does not show CISA KEV listing, active exploitation, public exploit availability, or exploitation prerequisites. Treat this as a firmware privilege-escalation risk requiring vendor-specific confirmation, not as confirmed exploited activity.

Researcher notes

Evidence is sparse: no CVSS, CWE, CPEs, exploit status, or detailed root-cause text is provided. The most useful next step is vendor and OEM advisory correlation, especially Insyde SA-2021002 and any downstream product advisories.

Mitigation direction

  • Check Insyde SA-2021002 and each device OEM advisory for applicable firmware updates.
  • Prioritize firmware updates for confirmed affected Intel client chipset systems.
  • Consult NetApp advisory NTAP-20220223-0003 if NetApp-managed assets are in scope.
  • Document systems where firmware status cannot be verified and assign ownership for follow-up.

Validation and detection

  • Inventory endpoints and appliances for BIOS/UEFI vendor and InsydeH2O firmware lineage.
  • Compare firmware build dates and OEM advisories against the before-2021-10-14 condition.
  • Confirm whether any asset vendor maps this CVE to specific models or firmware releases.
  • Track remediation evidence by asset, firmware version, advisory reference, and update date.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2020-5955 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.