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CVE Record

CVE-2021-0107: Unchecked return value in the firmware for some Intel(R) Processors may allow a privileged user to potentia...

Unchecked return value in the firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

MediumCVSS 6.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a firmware flaw in some Intel processors. An attacker already on a system with high local privileges could potentially gain more control. It is not described as remotely exploitable, but successful abuse could affect confidentiality, integrity, and availability.

Executive priority

Treat as a moderate firmware-risk item. It is not a broad remote emergency from the supplied evidence, but it should be included in firmware maintenance for critical servers and appliances.

Technical view

CVE-2021-0107 is CWE-252, an unchecked return value in firmware for some Intel processors. CVSS 3.1 is 6.7: local access, low complexity, high privileges required, no user interaction, and high C/I/A impact. Exact affected processor models and firmware versions are not included in the supplied bundle.

Likely exposure

Exposure is likely limited to systems or appliances using affected Intel processor firmware. Confirm exact processor and firmware applicability through Intel SA-00527 and any relevant OEM or NetApp guidance.

Exploitation context

The provided bundle does not support active exploitation, and KEV is false. The attack requires local access and high privileges, reducing mass remote risk while still mattering for hardened servers, appliances, and shared administrative environments.

Researcher notes

Evidence is limited to the CVE description, CVSS vector, CWE, KEV=false, and vendor advisory references. Do not assume affected model lists, exploit availability, or fixed versions without reviewing Intel SA-00527 and relevant OEM advisories.

Mitigation direction

  • Review Intel SA-00527 for affected firmware and update guidance.
  • Check OEM firmware, BIOS, and platform advisories for matching systems.
  • Review NetApp advisory if NetApp appliances are in scope.
  • Prioritize updates on shared, sensitive, and administrator-accessible systems.
  • Restrict local administrative access where firmware updates are pending.

Validation and detection

  • Inventory Intel processor platforms and current firmware or BIOS versions.
  • Compare inventory against Intel SA-00527 affected product guidance.
  • Check NetApp advisory for any deployed NetApp product exposure.
  • Confirm vendor firmware updates are installed and documented.
  • Verify local privileged access is limited to approved administrators.
Prepared
Confidence
medium
Sources
4

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-252: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2021-0107 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.7 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.7CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H0.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.7Medium
CVSS 3.1 vector shape for CVE-2021-0107Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aIntel(R) ProcessorsSee referencesListed
Weakness

CWE details

CWE-252

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

CWE-252 · source CWE mapping

Unchecked Return Value

Unchecked Return Value represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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