SWUpdate Untrusted Script Execution via Signed Update TOCTOU

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Summary

CVECVE-2025-41259
StatePUBLISHED
Assignersba-research
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-03 13:16:18 UTC
Updated2026-06-03 14:16:30 UTC
DescriptionSWUpdate before 2026.05 is affected by a time-of-check time-of-use (TOCTOU) race condition that allows local unprivileged attackers to escalate privileges to root or install untrusted contents using a signed update.

Risk And Classification

Primary CVSS: v4.0 7.3 HIGH from 1e3a9e0f-5156-4bf8-b8a3-cc311bfc0f4a

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-367 | CWE-367 CWE-367 Time-of-check time-of-use (TOCTOU) race condition

VersionSourceTypeScoreSeverityVector
4.01e3a9e0f-5156-4bf8-b8a3-cc311bfc0f4aSecondary7.3HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS7.3HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sbabic SWUpdate affected 2026.05 custom Not specified

References

ReferenceSourceLinkTags
github.com/sbabic/swupdate 1e3a9e0f-5156-4bf8-b8a3-cc311bfc0f4a github.com
github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20251206-01_S... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/sbabic/swupdate/commit/f4bd64260e233e207354d68d572b1cbc3e63689d 1e3a9e0f-5156-4bf8-b8a3-cc311bfc0f4a github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Reinhard Kugler (SBA Research) (en)

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