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CVE-2026-40639

MEDIUM 5.7

Published 2026-06-09 · Last modified 2026-06-09

Dell Client Platform BIOS contains a Weak Encoding for Password vulnerability. An unauthenticated attacker with physical access could potentially exploit this vulnerability, leading to Elevation of Privileges.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.1%chance of exploitation in 30 days · 2nd percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

5.7CVSS 3.1 · MEDIUM

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityNone

What an attacker needs

  • ⚠Access: Requires physical access to the device
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ⚠Complexity: Needs a race window or specific setup

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-40639/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-40639/poc.json

Affected

Vendors Dell

Products Dell Edge Gateway 3000 Dell Edge Gateway 5000 Dell Embedded Pc 3000 Dell Embedded Pc 5000 Dell Precision 3630 Tower Dell Precision 3930 Rack Latitude 7220 Rugged Extreme Latitude Rugged 5420 Latitude Rugged 5424 Latitude Rugged 7220ex Latitude Rugged 7424 Precision 3930 Rack

Weakness (CWE)

  • CWE-261: : Weak Encoding for Password

CVSS vector

CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

All CVSS metrics

  • MEDIUM 5.7 v3.1 · CNA Primary
    CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  • MEDIUM 5.7 v3.1 · NVD Secondary
    CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Advisories

Sources: NVD · CVE.org · EPSS