Security readout for executives and security teams
Plain-English summary
CVE-2021-0111 is a firmware flaw in some Intel processors. A user who already has high local privileges could potentially raise privileges further. This is not a remote drive-by issue, but it matters for servers, appliances, and administrator workstations where firmware trust boundaries are important.
Executive priority
Treat this as a controlled-priority firmware remediation item, not an emergency internet exposure. Prioritize high-value infrastructure where privileged local users or post-compromise actors could affect platform integrity.
Technical view
The issue is a NULL pointer dereference in Intel processor firmware, classified as CWE-476. CVSS 3.1 is 6.7 with local attack vector, low complexity, high privileges required, no user interaction, unchanged scope, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is limited to systems using Intel processors and firmware versions covered by Intel SA-00527. The supplied sources do not include the affected version list. NetApp published a related advisory, so NetApp-managed environments should check that vendor guidance too.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires local access and high privileges, which reduces broad internet risk but keeps insider, post-compromise, and shared-admin-system scenarios relevant.
Researcher notes
Key constraints are local access and PR:H. The public bundle identifies firmware NULL pointer dereference and high CIA impact, but does not include affected version granularity, proof-of-concept status, or detailed fix mechanics.
Mitigation direction
- Review Intel SA-00527 for affected processors and vendor-recommended firmware updates.
- Apply BIOS, firmware, or platform updates from the system OEM or appliance vendor.
- Review NetApp advisory NTAP-20220210-0007 for NetApp-specific exposure and remediation.
- Prioritize shared systems, virtualization hosts, and administrator workstations using affected Intel hardware.
Validation and detection
- Inventory Intel processor models and current BIOS or firmware versions.
- Compare inventory against Intel SA-00527 affected product guidance.
- Check OEM support portals for matching firmware update status.
- For NetApp assets, validate product status against NTAP-20220210-0007.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-476: 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.
Open ATT&CK lookupCVE-2021-0111 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- 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
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H0.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00527.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220210-0007/CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.