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CVE Record

CVE-2021-33115: Improper input validation for some Intel(R) PROSet/Wireless WiFi in UEFI may allow an unauthenticated user...

Improper input validation for some Intel(R) PROSet/Wireless WiFi in UEFI may allow an unauthenticated user to potentially enable escalation of privilege via adjacent access.

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This is a high-severity Intel UEFI wireless issue. An unauthenticated attacker with adjacent access could potentially gain elevated privileges on affected systems. The public bundle does not identify exact affected versions or a confirmed patch, so exposure depends on Intel and OEM advisory details.

Executive priority

Treat as high priority for affected hardware fleets, especially laptops or systems using wireless pre-boot capabilities. Urgency is reduced compared with internet-facing flaws because adjacent access is required, but firmware-level privilege impact is serious.

Technical view

CVE-2021-33115 is improper input validation, CWE-20, in some Intel PROSet/Wireless WiFi in UEFI. CVSS 3.1 is 8.8 with adjacent attack vector, low complexity, no privileges, and no user interaction. The reported impact is high confidentiality, integrity, and availability loss through potential privilege escalation.

Likely exposure

Likely exposed assets are systems using the affected Intel PROSet/Wireless WiFi in UEFI. Internet-wide exposure is not supported by the sources; the CVSS vector requires adjacent access.

Exploitation context

The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The attack model is adjacent access, unauthenticated, low complexity, and no user interaction.

Researcher notes

Evidence is limited to the CVE description, CVSS vector, CWE-20 classification, and Intel advisory reference. Do not assume affected versions, exploit availability, or fixed builds unless confirmed in Intel SA-00582 or OEM advisories.

Mitigation direction

  • Review Intel SA-00582 for affected versions and vendor guidance.
  • Check OEM BIOS, UEFI, and wireless firmware update channels.
  • Prioritize systems with UEFI wireless or pre-boot network capabilities.
  • Restrict adjacent wireless exposure where feasible until remediation is confirmed.

Validation and detection

  • Inventory endpoints with Intel PROSet/Wireless WiFi in UEFI.
  • Compare installed firmware and driver versions with Intel SA-00582.
  • Check OEM advisories for model-specific BIOS or UEFI updates.
  • Confirm remediation status through endpoint firmware inventory.
  • Document exceptions where vendor guidance is unavailable.
Prepared
Confidence
medium
Sources
3

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-20: 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-2021-33115 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:A/AC:L/PR:N/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
2Source 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
8.8CVSS 3.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2021-33115Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:A/AC:L/PR:N/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) PROSet/Wireless WiFi in UEFISee referencesListed
Weakness

CWE details

CWE-20

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

CWE-20 · source CWE mapping

Improper Input Validation

Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs