What’s Vulnerable › Vulnerabilities

CVE-2025-41259: SWUpdate Untrusted Script Execution via Signed Update TOCTOU

• Severity: high (CVSS 7.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-03 · updated 2026-07-22
• Weakness: CWE-367

Description

SWUpdate 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.

Affected products

• sbabic swupdate: before 2026.05 — fixed in 2026.05

How to fix

Upgrade to a fixed version: sbabic swupdate 2026.05. Check the vendor advisory for mitigations.

References

• https://github.com/sbabic/swupdate
• https://github.com/sbabic/swupdate/commit/f4bd64260e233e207354d68d572b1cbc3e63689d
• https://github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20251206-01_SWUpdate_Untrusted_Script_Execution_via_Signed_Update_TOCTOU
• https://github.com/sbaresearch/advisories/tree/public/2025/SBA-ADV-20251206-01_SWUpdate_Untrusted_Script_Execution_via_Signed_Update_TOCTOU

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