NVD / CVE Program· CNA intel

CVE-2021-33117: Improper access control for some 3rd Generation Intel(R) Xeon(R) Scalable Processors before BIOS version MR7, may allow a local attacker to

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: 0.31% (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.
Fixed version: intel-microcode (Debian:12) 3.20220207.1.

Low priority for now. Upgrade to intel-microcode (Debian:12) 3.20220207.1 or later.

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

Improper access control for some 3rd Generation Intel(R) Xeon(R) Scalable Processors before BIOS version MR7, may allow a local attacker to potentially enable information disclosure via local access.

MediumCVSS 5.5 · v3.1—No exploit Fix available

BDU:2022-05180

Published: May 12, 2022
Updated: Jun 16, 2026
EPSS: 0.3% · 25th percentile
CWE: —

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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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.

Vendor	Product	CPE
intel	bios	cpe:2.3:o:intel:bios
intel	xeon gold 5315y	cpe:2.3:h:intel:xeon_gold_5315y
intel	xeon gold 5317	cpe:2.3:h:intel:xeon_gold_5317
intel	xeon gold 5318h	cpe:2.3:h:intel:xeon_gold_5318h
intel	xeon gold 5318n	cpe:2.3:h:intel:xeon_gold_5318n
intel	xeon gold 5318s	cpe:2.3:h:intel:xeon_gold_5318s
intel	xeon gold 5318y	cpe:2.3:h:intel:xeon_gold_5318y
intel	xeon gold 5320	cpe:2.3:h:intel:xeon_gold_5320
intel	xeon gold 5320h	cpe:2.3:h:intel:xeon_gold_5320h
intel	xeon gold 5320t	cpe:2.3:h:intel:xeon_gold_5320t
intel	xeon gold 6312u	cpe:2.3:h:intel:xeon_gold_6312u
intel	xeon gold 6314u	cpe:2.3:h:intel:xeon_gold_6314u

and 43 more

Affected versions

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

intel biosbefore mr7
netapp fas/aff biosall 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) Xeon(R) Scalable Processors
- See referencesaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	intel-microcode	before 3.20220207.1	3.20220207.1

Same product

intel: all records

Other highest-scoring records for the same primary product.

CVE-2019-14557Buffer overflow in BIOS firmware for 8th, 9th, 10th Generation Intel(R) Core(TM), Intel(R) Celeron(R) Processor 4000 & 5000 Series Processor
32Monitor
CVE-2020-12360Out of bounds read in the firmware for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privileg
31Monitor
CVE-2020-8672Out of bound read in BIOS firmware for 8th, 9th Generation Intel(R) Core(TM), Intel(R) Celeron(R) Processor 4000 Series Processors may allow
31Monitor

Published before and after this one in the same product

← EarlierCVE-2020-8670Jun 9, 2021 · Race condition in the firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via lo
25Monitor
← EarlierCVE-2020-8700Jun 9, 2021 · Improper input validation in the firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privi
26Monitor
← EarlierCVE-2021-0095Jun 9, 2021 · Improper initialization in the firmware for some Intel(R) Processors may allow a privileged user to potentially enable a denial of service v
17Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
debian:intel-microcode	3.20220207.1 · Debian:12	Package registry (OSV)

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

Intel® Vulnerability Disclosure Program Intigriti · disclosure only (VDP)

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.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: none
Availability: none

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

Weakness class (CWE)

—

CVSS vector

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

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

Fix✗ → ✓Sep 28, 2026, 10:48 PM UTC

For records you follow, these changes also arrive as notifications. →

References

security.netapp.com/advisory/ntap-20220818-0001/

Show all references (1 more)

www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00586.html

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

All records