Security readout for executives and security teams
Plain-English summary
This Dell BIOS issue weakens protections that should slow repeated admin-password guesses. It requires local authenticated administrator access, so it is not a typical remote intrusion path. The business concern is unauthorized BIOS-level configuration access on affected Dell systems if an admin account is already compromised or misused.
Executive priority
Treat as a moderate-priority hardening issue. It is not evidenced as remotely exploitable or actively exploited, but it can weaken BIOS-level controls after local admin compromise.
Technical view
CVE-2021-36284 is CWE-307 in Dell CPG BIOS. A local authenticated malicious administrator can bypass mitigations for excessive BIOS admin password attempts, enabling brute-force attempts against the BIOS admin password. CVSS 3.1 is 5.7 with local access and high privileges required.
Likely exposure
Exposure is limited to Dell systems with affected CPG BIOS versions. The provided CVE data does not list specific models or fixed BIOS versions, so asset teams must use Dell advisory 000191495 to determine applicability.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. Exploitation requires local authenticated administrator privileges, which materially reduces remote attack likelihood but matters for insider risk and post-compromise hardening.
Researcher notes
Key gaps are affected model coverage, fixed versions, and Dell’s exact remediation language, which are not present in the provided bundle. Avoid broad claims beyond Dell CPG BIOS and the local authenticated administrator threat model.
Mitigation direction
- Review Dell advisory 000191495 for affected models and vendor guidance.
- Update BIOS or firmware only where Dell identifies an applicable fix.
- Restrict and review local administrator access on Dell systems.
- Protect BIOS admin passwords with strong uniqueness and controlled disclosure.
- Monitor for unauthorized BIOS or firmware configuration changes.
Validation and detection
- Inventory Dell assets and record model and BIOS version details.
- Compare each Dell system against advisory 000191495 applicability criteria.
- Confirm BIOS admin passwords are set only where operationally required.
- Review local administrator membership on affected endpoints.
- Document remediation status for affected BIOS versions.
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-307: 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 lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-36284 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
- 5.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
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:C/C:L/I:L/A:L1.53.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/kbdoc/000191495CVE 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.
Improper Restriction of Excessive Authentication Attempts
Improper Restriction of Excessive Authentication Attempts represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.