CVE-2026-81051

ThinOS 10 Security Version Number Downgrade Vulnerability Allows Protection Mechanism Bypass

Published Sep 10, 2026 CVSS 3.1 · 6.6 Medium EPSS < 1% KEV · Not listed

Description

Dell ThinOS 10, versions prior to 2605_10.2616, contain a Security Version Number Mutable to Older Versions vulnerability. A low privileged attacker with physical access could potentially exploit this vulnerability, leading to Protection mechanism bypass.

Analysis

Technical impact

Dell ThinOS 10 releases prior to build 2605_10.2616 contain a flaw that allows a low‑privileged user with physical access to downgrade the security version number. This manipulation can bypass protection mechanisms and is an example of CWE‑1328.

Affected Systems

This vulnerability affects Dell ThinOS 10 in all versions before build 2605_10.2616. The affected vendor is Dell and the product is ThinOS 10.

Risk and Exploitability

The CVSS score is 6.6, indicating moderate severity. No EPSS score is publicly available, and the vulnerability is not listed in CISA KEV. Because the condition requires proximity to the device, the exploitation risk is limited to environments where the device is physically accessible.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Dell

ThinOS 10

unaffected

Version	Status	Constraints
`0`	affected	< 2605_10.2616

Configuration 1 [-]

AND

cpe:2.3:o:dell:thinos:*:*:*:*:*:*:*:*

OR	cpe:2.3:h:dell:latitude_3330:-:::::::*
	cpe:2.3:h:dell:latitude_3420:-:::::::*
	cpe:2.3:h:dell:latitude_3440:-:::::::*
	cpe:2.3:h:dell:latitude_3450:-:::::::*
	cpe:2.3:h:dell:latitude_5440:-:::::::*
	cpe:2.3:h:dell:latitude_5450:-:::::::*
	cpe:2.3:h:dell:latitude_5520:-:::::::*
	cpe:2.3:h:dell:latitude_5530:-:::::::*
	cpe:2.3:h:dell:latitude_5540:-:::::::*
	cpe:2.3:h:dell:latitude_5550:-:::::::*
	cpe:2.3:h:dell:optiplex_3000_tc:-:::::::*
	cpe:2.3:h:dell:optiplex_5400_all-in-one:-:::::::*
	cpe:2.3:h:dell:optiplex_7020:-:::::::*
	cpe:2.3:h:dell:optiplex_all-in-one_7410:-:::::::*
	cpe:2.3:h:dell:optiplex_all-in-one_7420:-:::::::*
	cpe:2.3:h:dell:optiplex_micro_plus_7010:-:::::::*
	cpe:2.3:h:dell:precision_3260_compact:-:::::::*
	cpe:2.3:h:dell:precision_3280:-:::::::*
	cpe:2.3:h:dell:pro_14_pc14250:-:::::::*
	cpe:2.3:h:dell:pro_16_pc16250:-:::::::*
	cpe:2.3:h:dell:pro_16_plus_pb16250:-:::::::*
	cpe:2.3:h:dell:pro_24_all-in-one:-:::::::*
	cpe:2.3:h:dell:pro_24_all-in-one_\(65w\)_qc24250:-:::::::*
	cpe:2.3:h:dell:pro_24_all-in-one_plus_qb24250:-:::::::*
	cpe:2.3:h:dell:pro_max_14:-:::::::*
	cpe:2.3:h:dell:pro_max_16_plus:-:::::::*
	cpe:2.3:h:dell:pro_max_microfcm2250:-:::::::*
	cpe:2.3:h:dell:pro_micro-thin_client_q9m1260:-:::::::*
	cpe:2.3:h:dell:pro_micro_qcm1250:-:::::::*
	cpe:2.3:h:dell:pro_rugged_13_ra13250:-:::::::*
	cpe:2.3:h:dell:pro_rugged_14_rb14250:-:::::::*
	cpe:2.3:h:dell:pro_slim_low_sff:-:::::::*
	cpe:2.3:h:dell:pro_slim_plus_xe5_oem_qbs1250:-:::::::*
	cpe:2.3:h:dell:pro_tower_plus_xe5_oem_qbt1250:-:::::::*
	cpe:2.3:h:dell:pro_tower_qct1250:-:::::::*
	cpe:2.3:h:dell:wyse_5070_extended_thin_client:-:::::::*
	cpe:2.3:h:dell:wyse_5070_thin_client:-:::::::*
	cpe:2.3:h:dell:wyse_5470_all-in-one_thin_client:-:::::::*
	cpe:2.3:h:dell:wyse_5470_mtc:-:::::::*

No data.

Vendor Product Versions

Dell

Thinos

Version	Status	Scheme	Platform
`[0,2605_10.2616)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply Dell Security Update DSA-2026-389 to upgrade ThinOS to build 2605_10.2616 or newer.
Enforce physical security controls to restrict unauthorized hardware access, including lock‑out policies verify patch compatibility and deployment plan.
Establish a regular patch management schedule to keep ThinOS devices up to date and reduce exposure to this vulnerability.

Generated by OpenCVE AI on September 10, 2026 at 18:13 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Physical

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.196% probability within 30 days)

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://www.dell.com/support/kbdoc/en-us/000502746/dsa-2026-389-security-update-for-dell-thinos-10-for-multiple-vulnerabilities

History

Sep 16, 2026 9:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Dell latitude 3330 Dell latitude 3420 Dell latitude 3440 Dell latitude 3450 Dell latitude 5440 Dell latitude 5450 Dell latitude 5520 Dell latitude 5530 Dell latitude 5540 Dell latitude 5550 Dell optiplex 3000 Tc Dell optiplex 5400 All-in-one Dell optiplex 7020 Dell optiplex All-in-one 7410 Dell optiplex All-in-one 7420 Dell optiplex Micro Plus 7010 Dell precision 3260 Compact Dell precision 3280 Dell pro 14 Pc14250 Dell pro 16 Pc16250 Dell pro 16 Plus Pb16250 Dell pro 24 All-in-one Dell pro 24 All-in-one \(65w\) Qc24250 Dell pro 24 All-in-one Plus Qb24250 Dell pro Max 14 Dell pro Max 16 Plus Dell pro Max Microfcm2250 Dell pro Micro-thin Client Q9m1260 Dell pro Micro Qcm1250 Dell pro Rugged 13 Ra13250 Dell pro Rugged 14 Rb14250 Dell pro Slim Low Sff Dell pro Slim Plus Xe5 Oem Qbs1250 Dell pro Tower Plus Xe5 Oem Qbt1250 Dell pro Tower Qct1250 Dell wyse 5070 Extended Thin Client Dell wyse 5070 Thin Client Dell wyse 5470 All-in-one Thin Client Dell wyse 5470 Mtc
CPEs		cpe:2.3:h:dell:latitude_3330:-:::::::* cpe:2.3:h:dell:latitude_3420:-:::::::* cpe:2.3:h:dell:latitude_3440:-:::::::* cpe:2.3:h:dell:latitude_3450:-:::::::* cpe:2.3:h:dell:latitude_5440:-:::::::* cpe:2.3:h:dell:latitude_5450:-:::::::* cpe:2.3:h:dell:latitude_5520:-:::::::* cpe:2.3:h:dell:latitude_5530:-:::::::* cpe:2.3:h:dell:latitude_5540:-:::::::* cpe:2.3:h:dell:latitude_5550:-:::::::* cpe:2.3:h:dell:optiplex_3000_tc:-:::::::* cpe:2.3:h:dell:optiplex_5400_all-in-one:-:::::::* cpe:2.3:h:dell:optiplex_7020:-:::::::* cpe:2.3:h:dell:optiplex_all-in-one_7410:-:::::::* cpe:2.3:h:dell:optiplex_all-in-one_7420:-:::::::* cpe:2.3:h:dell:optiplex_micro_plus_7010:-:::::::* cpe:2.3:h:dell:precision_3260_compact:-:::::::* cpe:2.3:h:dell:precision_3280:-:::::::* cpe:2.3:h:dell:pro_14_pc14250:-:::::::* cpe:2.3:h:dell:pro_16_pc16250:-:::::::* cpe:2.3:h:dell:pro_16_plus_pb16250:-:::::::* cpe:2.3:h:dell:pro_24_all-in-one:-:::::::* cpe:2.3:h:dell:pro_24_all-in-one_\(65w\)_qc24250:-:::::::* cpe:2.3:h:dell:pro_24_all-in-one_plus_qb24250:-:::::::* cpe:2.3:h:dell:pro_max_14:-:::::::* cpe:2.3:h:dell:pro_max_16_plus:-:::::::* cpe:2.3:h:dell:pro_max_microfcm2250:-:::::::* cpe:2.3:h:dell:pro_micro-thin_client_q9m1260:-:::::::* cpe:2.3:h:dell:pro_micro_qcm1250:-:::::::* cpe:2.3:h:dell:pro_rugged_13_ra13250:-:::::::* cpe:2.3:h:dell:pro_rugged_14_rb14250:-:::::::* cpe:2.3:h:dell:pro_slim_low_sff:-:::::::* cpe:2.3:h:dell:pro_slim_plus_xe5_oem_qbs1250:-:::::::* cpe:2.3:h:dell:pro_tower_plus_xe5_oem_qbt1250:-:::::::* cpe:2.3:h:dell:pro_tower_qct1250:-:::::::* cpe:2.3:h:dell:wyse_5070_extended_thin_client:-:::::::* cpe:2.3:h:dell:wyse_5070_thin_client:-:::::::* cpe:2.3:h:dell:wyse_5470_all-in-one_thin_client:-:::::::* cpe:2.3:h:dell:wyse_5470_mtc:-:::::::* cpe:2.3:o:dell:thinos::::::::
Vendors & Products		Dell latitude 3330 Dell latitude 3420 Dell latitude 3440 Dell latitude 3450 Dell latitude 5440 Dell latitude 5450 Dell latitude 5520 Dell latitude 5530 Dell latitude 5540 Dell latitude 5550 Dell optiplex 3000 Tc Dell optiplex 5400 All-in-one Dell optiplex 7020 Dell optiplex All-in-one 7410 Dell optiplex All-in-one 7420 Dell optiplex Micro Plus 7010 Dell precision 3260 Compact Dell precision 3280 Dell pro 14 Pc14250 Dell pro 16 Pc16250 Dell pro 16 Plus Pb16250 Dell pro 24 All-in-one Dell pro 24 All-in-one \(65w\) Qc24250 Dell pro 24 All-in-one Plus Qb24250 Dell pro Max 14 Dell pro Max 16 Plus Dell pro Max Microfcm2250 Dell pro Micro-thin Client Q9m1260 Dell pro Micro Qcm1250 Dell pro Rugged 13 Ra13250 Dell pro Rugged 14 Rb14250 Dell pro Slim Low Sff Dell pro Slim Plus Xe5 Oem Qbs1250 Dell pro Tower Plus Xe5 Oem Qbt1250 Dell pro Tower Qct1250 Dell wyse 5070 Extended Thin Client Dell wyse 5070 Thin Client Dell wyse 5470 All-in-one Thin Client Dell wyse 5470 Mtc

Sep 14, 2026 9:00 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Sep 13, 2026 7:45 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Dell Dell thinos
Vendors & Products		Dell Dell thinos

Sep 10, 2026 6:30 PM Title updated View changes

Type	Values Removed	Values Added
Title		ThinOS 10 Security Version Number Downgrade Vulnerability Allows Protection Mechanism Bypass

Sep 10, 2026 3:45 PM Description updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Dell ThinOS 10, versions prior to 2605_10.2616, contain a Security Version Number Mutable to Older Versions vulnerability. A low privileged attacker with physical access could potentially exploit this vulnerability, leading to Protection mechanism bypass.
Weaknesses		CWE-1328
References		https://www.dell.com/support/kbdoc/en-us/000502746/dsa-2026-389-security-update-for-dell-thinos-10-for-multiple-vulnerabilities
Metrics		cvssV3_1 `{'score': 6.6, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Subscriptions

Dell Latitude 3330 Latitude 3420 Latitude 3440 Latitude 3450 Latitude 5440 Latitude 5450 Latitude 5520 Latitude 5530 Latitude 5540 Latitude 5550 Optiplex 3000 Tc Optiplex 5400 All-in-one Optiplex 7020 Optiplex All-in-one 7410 Optiplex All-in-one 7420 Optiplex Micro Plus 7010 Precision 3260 Compact Precision 3280 Pro 14 Pc14250 Pro 16 Pc16250 Pro 16 Plus Pb16250 Pro 24 All-in-one Pro 24 All-in-one \(65w\) Qc24250 Pro 24 All-in-one Plus Qb24250 Pro Max 14 Pro Max 16 Plus Pro Max Microfcm2250 Pro Micro-thin Client Q9m1260 Pro Micro Qcm1250 Pro Rugged 13 Ra13250 Pro Rugged 14 Rb14250 Pro Slim Low Sff Pro Slim Plus Xe5 Oem Qbs1250 Pro Tower Plus Xe5 Oem Qbt1250 Pro Tower Qct1250 Thinos Wyse 5070 Extended Thin Client Wyse 5070 Thin Client Wyse 5470 All-in-one Thin Client Wyse 5470 Mtc

Weaknesses