Security readout for executives and security teams
Plain-English summary
This issue affects Dell XPS 13 2-in-1 (7390) systems running BIOS versions before 1.1.3. A default BIOS Thunderbolt pre-boot setting can let someone with physical access read or change system memory during boot. This is high impact, but it requires hands-on access to the device.
Executive priority
Treat this as a targeted physical-access laptop risk, not an internet-scale emergency. Prioritize BIOS remediation for affected mobile systems, especially devices used by executives, travelers, or staff in shared environments.
Technical view
The BIOS enables "Enable Thunderbolt (and PCIe behind TBT) pre-boot modules" by default. On affected Dell XPS 13 2-in-1 (7390) BIOS versions prior to 1.1.3, a local unauthenticated attacker with physical access can perform DMA access to main memory during platform boot. CVSS is 7.6, AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Likely exposure
Exposure is limited to Dell XPS 13 2-in-1 (7390) systems with BIOS versions prior to 1.1.3. The provided sources do not establish exposure for other Dell models or products.
Exploitation context
The attack path is physical, unauthenticated, and tied to platform boot. The source bundle does not indicate CISA KEV listing or active exploitation. Risk is highest for laptops exposed to untrusted physical environments.
Researcher notes
Evidence supports a BIOS configuration weakness mapped to CWE-16 with DMA read/write impact during boot. The bundle names the vulnerable default setting and fixed version threshold, but does not provide deeper technical details, exploit telemetry, or broader product applicability.
Mitigation direction
- Confirm Dell advisory SLN319808 for approved remediation guidance.
- Update affected systems from BIOS versions prior to 1.1.3.
- Review the Thunderbolt pre-boot module setting against Dell guidance.
- Limit unattended physical access to affected laptops.
- Prioritize higher-risk mobile or executive devices.
Validation and detection
- Inventory Dell XPS 13 2-in-1 (7390) endpoints.
- Check BIOS versions and flag anything before 1.1.3.
- Verify the Thunderbolt pre-boot module configuration.
- Confirm physical security controls for affected devices.
- Record that KEV evidence is absent in 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-16: 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-2019-18579 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
- 7.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:P/AC:L/PR:N/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:3.0/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H0.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.6HighVector: CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.dell.com/support/article/SLN319808CVE 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.
Configuration
Configuration represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.