LiveActive security incident?Get immediate response
CVE Record

CVE-2021-0103: Insufficient control flow management in the firmware for some Intel(R) Processors may allow a privileged us...

Insufficient control flow management in the firmware for some Intel(R) Processors may allow a privileged user to potentially enable an escalation of privilege via local access.

MediumCVSS 6.7Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-0103 is a firmware flaw in some Intel processors. A user who already has high local privileges could use it to gain greater control. This is not a remote internet attack based on the supplied evidence, but it matters for servers, appliances, and endpoints where privileged local access is possible.

Executive priority

Treat as a controlled remediation item, not an emergency internet-facing incident. Prioritize high-value platforms and environments where privileged local users or post-compromise attackers could affect confidentiality, integrity, or availability.

Technical view

The CVE describes insufficient control flow management in processor firmware. CVSS 3.1 is 6.7 with local access, low complexity, high privileges required, no user interaction, unchanged scope, and high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is likely limited to systems using the affected Intel processor firmware listed by Intel. The bundle does not include specific processor models or NetApp product status, so asset matching requires vendor advisory review.

Exploitation context

No CISA KEV listing is provided, and the bundle does not cite active exploitation. Exploitation requires local access and high privileges, making it most relevant after compromise, insider misuse, or weak administrative boundary scenarios.

Researcher notes

Evidence is sparse in the supplied bundle: no CWE, no specific affected versions, and no exploit details. Analysis should stay anchored to Intel SA-00527 and relevant vendor advisories before asserting product exposure or remediation completeness.

Mitigation direction

  • Review Intel SA-00527 for affected processor firmware guidance.
  • Apply vendor-provided BIOS, firmware, or platform updates where available.
  • Check OEM or appliance vendor advisories for packaged firmware updates.
  • Prioritize shared servers, virtualization hosts, and sensitive management systems.
  • Restrict local administrative access and monitor privileged activity.

Validation and detection

  • Inventory systems by processor model, firmware, BIOS, and platform vendor.
  • Compare inventory against Intel SA-00527 affected product details.
  • Review NetApp advisory status if NetApp systems are in scope.
  • Confirm firmware update availability through OEM support channels.
  • Document systems where vendor guidance is unavailable or pending.
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.

cve · low confidence lookup

CVE-2021-0103 mapping review

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

Open ATT&CK lookup
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-2021-0103Attack 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

No CWE listed

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