What is CVE-2026-40639?
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.
The record classifies CVE-2026-40639 under weakness class CWE-261. Its CVSS v3 base vector states that the flaw requires physical access to the device, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity. 12 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 141 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 5.7 — MEDIUM
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - EPSS (FIRST)
- 0.1% probability of exploitation in the next 30 days, higher than 5.5% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 3.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-06-09
Is CVE-2026-40639 being exploited?
It currently carries a trending score of 6 in the Threadlinqs vulnerability feed.
Affected products and versions
- Dell: Edge Gateway 3000, Edge Gateway 5000, EMBEDDED PC 3000, EMBEDDED PC 5000, Precision 3630 Tower, Precision 3930 Rack, Latitude 7220 Rugged Extreme, Latitude Rugged 5420, Latitude Rugged 5424, Latitude Rugged 7220EX, Latitude Rugged 7424
Showing 11 of 12 recorded product entries.
How to fix CVE-2026-40639
No vendor patch reference has been recorded for CVE-2026-40639 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-40639
1 tracked threat in the Threadlinqs corpus references CVE-2026-40639, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on .