Security readout for executives and security teams
Plain-English summary
CVE-2021-33149 is a medium-severity Intel processor issue where a local authorized user may observe behavioral differences that could disclose sensitive information. It requires local access and privileges, so internet-wide remote exploitation is not indicated by the provided sources.
Executive priority
Treat this as a targeted confidentiality risk, not an emergency remote-exploitation event. Prioritize assessment where sensitive workloads run on shared Intel-based systems or where many local users have access.
Technical view
The CVE maps to CWE-203, an observable behavioral discrepancy. CVSS 3.1 is 5.5: local attack vector, low complexity, low privileges, no user interaction, unchanged scope, high confidentiality impact, no integrity or availability impact.
Likely exposure
Exposure is most relevant on systems using affected Intel processors, especially shared servers, workstations, virtualization hosts, or appliances where untrusted or lower-privileged local users can run code. The provided bundle does not include the exact affected processor list.
Exploitation context
The source bundle does not cite active exploitation, and the CVE is not marked CISA KEV. Practical risk depends on local access, processor model, workload sensitivity, and whether platform vendor guidance has been applied.
Researcher notes
Evidence is limited in the supplied bundle. The CVE description, CVSS vector, CWE, Intel advisory link, and NetApp advisory link support the analysis, but exact affected SKUs, exploit details, and remediation specifics must be confirmed from vendor advisories.
Mitigation direction
- Review Intel SA-00648 for affected processor and remediation guidance.
- Check OEM, cloud, and appliance vendor guidance before applying platform updates.
- For NetApp environments, review NTAP-20220818-0002 for product-specific exposure.
- Limit local access to systems processing sensitive data.
- Prioritize shared or multi-user systems for assessment.
Validation and detection
- Inventory Intel processor models across servers, endpoints, and appliances.
- Compare inventory against Intel SA-00648 affected product guidance.
- Identify systems allowing local shell, desktop, container, or tenant access.
- Check firmware, BIOS, microcode, and OS update status against vendor guidance.
- Document systems where exact affected status remains unknown.
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-203: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. 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-2021-33149 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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:L/UI:N/S:U/C:H/I:N/A:N1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00648.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220818-0002/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.
Observable Discrepancy
Observable Discrepancy represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.