Security readout for executives and security teams
Plain-English summary
CVE-2021-3808 is a high-severity HP PC BIOS/UEFI firmware issue. On affected HP PCs, a local user with low privileges could potentially trigger arbitrary code execution in firmware. Firmware compromise can be serious because it may persist below the operating system. HP says firmware updates are being released to mitigate it.
Executive priority
Treat this as a high-priority endpoint firmware hygiene issue, especially for fleets with many HP PCs. It is not internet-remote based on the CVSS vector, but successful exploitation could affect the device below the operating system.
Technical view
The CVE describes potential vulnerabilities in BIOS/UEFI firmware for certain HP PC products. CVSS 3.1 is 7.8 with local access, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact. The mapped weakness is CWE-269, improper privilege management.
Likely exposure
Exposure is limited to certain HP PC products running affected BIOS versions. The source bundle does not enumerate models or versions, instead directing users to HP Security Bulletin HPSBHF03788 for the affected-version list.
Exploitation context
The supplied sources do not indicate active exploitation, and the CVE is not marked as CISA KEV. The CVSS vector indicates an attacker would need local access and low privileges, with no victim interaction required.
Researcher notes
Evidence is limited to the CVE metadata and HP advisory reference in the source bundle. The advisory should be used for exact model and version mapping. Avoid assuming exploit availability or affected products beyond the HP bulletin.
Mitigation direction
- Review HP Security Bulletin HPSBHF03788 for affected models and firmware versions.
- Inventory HP PCs and capture current BIOS or UEFI firmware versions.
- Apply the HP firmware updates identified for affected systems.
- Prioritize devices with broad user access or high business sensitivity.
- Track exceptions where firmware cannot be updated immediately.
Validation and detection
- Compare each HP model and BIOS version against the HP bulletin.
- Confirm updated firmware versions after remediation.
- Check endpoint inventory for remaining vulnerable HP BIOS versions.
- Document unsupported or deferred systems for risk acceptance.
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-269: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2021-3808 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/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:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://support.hp.com/us-en/document/ish_6184733-6184761-16/hpsbhf03788CVE reference
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 Privilege Management
Improper Privilege Management represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.