Security readout for executives and security teams
Plain-English summary
This is a Dell BIOS flaw that could let a local, already-authenticated attacker run code in highly privileged firmware memory. It is serious because firmware compromise can undermine operating system protections, but the sources show high attack requirements and no confirmed active exploitation.
Executive priority
Treat this as a high-priority firmware hygiene issue for Dell assets, especially privileged workstations and servers. It is not shown as actively exploited, but firmware-level compromise can be difficult to detect and recover from.
Technical view
CVE-2021-36323 is CWE-20 improper input validation in Dell CPG BIOS. A local authenticated malicious user may abuse an SMI path to gain arbitrary code execution in SMRAM. CVSS 3.1 is 7.5 with local access, high complexity, and high privileges required.
Likely exposure
Exposure is limited to systems using affected Dell CPG BIOS versions, but the provided sources do not list exact models or BIOS versions. Organizations with Dell fleets should validate against Dell advisory KB 000192967.
Exploitation context
The source bundle marks KEV as false and provides no cited evidence of exploitation in the wild. Exploitation requires local access, authentication, high privileges, and high complexity, reducing mass exploitation likelihood but increasing concern for targeted post-compromise persistence.
Researcher notes
Evidence is limited to the CVE description and Dell reference. The public bundle does not provide affected model granularity, proof of exploitation, or explicit fix details. Avoid assuming exploitability beyond local authenticated SMI abuse leading to SMRAM code execution.
Mitigation direction
- Review Dell advisory KB 000192967 for affected models and vendor remediation.
- Inventory Dell systems and record BIOS model and version data.
- Prioritize vendor-recommended BIOS remediation for exposed or high-value systems.
- Restrict local administrative access on Dell endpoints and servers.
- Monitor Dell guidance for model-specific updates or compensating controls.
Validation and detection
- Identify assets running Dell CPG BIOS or covered Dell platforms.
- Compare BIOS versions against Dell advisory KB 000192967.
- Confirm whether affected systems have unnecessary local privileged users.
- Check vulnerability records for this CVE in endpoint or asset tools.
- Document KEV status as not listed based on the provided bundle.
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-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.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-36323 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/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:H/PR:H/UI:N/S:C/C:H/I:H/A:H0.86Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/kbdoc/en-us/000192967CVE reference · x_refsource_MISC
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.