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NVD / CVE Program· CNA intel

CVE-2021-33086: Out-of-bounds write in firmware for some Intel(R) NUCs may allow an authenticated user to potentially enable denial of service via local acc

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Out-of-bounds write in firmware for some Intel(R) NUCs may allow an authenticated user to potentially enable denial of service via local access.

MediumCVSS 5.5 · v3.1—No exploit No fix recorded
Published
Nov 17, 2021
Updated
Jun 16, 2026
EPSS
0.2% · 12th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-33086

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
intelnuc m15 laptop kit lapbc510 firmware
intelnuc m15 laptop kit lapbc510
intelnuc m15 laptop kit lapbc710 firmware
intelnuc m15 laptop kit lapbc710
intelnuc 11 compute element cm11ebc4w firmware
intelnuc 11 compute element cm11ebc4w
intelnuc 11 compute element cm11ebi38w firmware
intelnuc 11 compute element cm11ebi38w
intelnuc 11 compute element cm11ebi58w firmware
intelnuc 11 compute element cm11ebi58w
intelnuc 11 compute element cm11ebi716w firmware
intelnuc 11 compute element cm11ebi716w

and 188 more

Affected versions

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

  • intel nuc 10 performance kit nuc10i3fnh firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i3fnhf firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i3fnhfa firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i3fnhja firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i3fnk firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i5fnh firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i5fnhca firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i5fnhf firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i5fnhj firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i5fnhja firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i5fnk firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i5fnkp firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i5fnkpa firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i7fnh firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i7fnhaa firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i7fnhc firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i7fnhja firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i7fnk firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i7fnkp firmwarebefore fncml.0052
  • intel nuc 10 performance kit nuc10i7fnkpa firmwarebefore fncml.0052

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) NUCs

    • See referencesaffected

Same product

intel: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-40250Stack overflow vulnerability in SMI handler on SmmSmbiosElog.
    35Monitor
  • CVE-2022-40261SMM memory corruption vulnerability in OverClockSmiHandler SMM driver
    32Monitor
  • CVE-2022-26873The stack buffer overflow vulnerability in PlatformInitAdvancedPreMem leads to arbitrary code execution during PEI phase.
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-0054Jun 9, 2021 · Improper buffer restrictions in system firmware for some Intel(R) NUCs may allow a privileged user to potentially enable escalation of privi
    26Monitor
  • ← EarlierCVE-2021-0067Jun 9, 2021 ·  Improper access control in system firmware for some Intel(R) NUCs may allow a privileged user to potentially enable escalation of priv
    26Monitor
  • Later →CVE-2022-40246Sep 20, 2022 · Arbitrary write vulnerability in SbPei module leads to arbitrary code execution during PEI phase.
    28Monitor

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.

No history yet (it accumulates with the daily EPSS job).

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.

Credits

All researchers

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.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

All records