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CVE-2021-0187· NVD / CVE Program· CNA intel

Improper access control in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable an escalation of

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

HighCVSS 8.2 · v3.1—No exploit No fix recorded

Noroxi analysis

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Published
Feb 16, 2023
Updated
Jun 16, 2026
EPSS
0.2% · 10th percentile
CWE
—
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Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.2 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
8.2
CNA · intel
3.2
5.0 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

VendorProduct
intelxeon gold 6328h
intelxeon gold 6342 firmware
intelxeon gold 6342
intelxeon gold 6346 firmware
intelxeon gold 6346
intelxeon gold 6330 firmware
intelxeon gold 6330
intelxeon platinum 8360y firmware
intelxeon platinum 8360y
intelxeon gold 6354 firmware
intelxeon gold 6354
intelxeon gold 6314u firmware

and 94 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • intel xeon gold 5315y firmwareall versions
  • intel xeon gold 5317 firmwareall versions
  • intel xeon gold 5318h firmwareall versions
  • intel xeon gold 5318n firmwareall versions
  • intel xeon gold 5318s firmwareall versions
  • intel xeon gold 5318y firmwareall versions
  • intel xeon gold 5320 firmwareall versions
  • intel xeon gold 5320h firmwareall versions
  • intel xeon gold 5320t firmwareall versions
  • intel xeon gold 6312u firmwareall versions
  • intel xeon gold 6314u firmwareall versions
  • intel xeon gold 6326 firmwareall versions
  • intel xeon gold 6328h firmwareall versions
  • intel xeon gold 6328hl firmwareall versions
  • intel xeon gold 6330 firmwareall versions
  • intel xeon gold 6330h firmwareall versions
  • intel xeon gold 6330n firmwareall versions
  • intel xeon gold 6334 firmwareall versions
  • intel xeon gold 6336y firmwareall versions
  • intel xeon gold 6338 firmwareall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (intel). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a Intel(R) Processors

    • See referencesaffected

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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