Vulnerability · Published Jun 3, 2026 · Assigned by sba-research
CVE-2025-41259SWUpdate Untrusted Script Execution via Signed Update TOCTOU
High 7.3
In plain English
A high-severity security flaw in SWUpdate from sbabic. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)7.3High
Exploit odds (30 days)0.1%top 99.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | swupdate | 2022.12+dfsg-4+deb12u3 | DEBIAN-CVE-2025-41259 |
| Debian:13 | swupdate | no fix listed | DEBIAN-CVE-2025-41259 |
| Debian:14 | swupdate | 2026.05+dfsg-1 | DEBIAN-CVE-2025-41259 |
| Ubuntu:22.04:LTS | swupdate | no fix listed | UBUNTU-CVE-2025-41259 |
| Ubuntu:24.04:LTS | swupdate | no fix listed | UBUNTU-CVE-2025-41259 |
| Ubuntu:25.10 | swupdate | no fix listed | UBUNTU-CVE-2025-41259 |
| Ubuntu:26.04:LTS | swupdate | no fix listed | UBUNTU-CVE-2025-41259 |
| Ubuntu:26.10 | swupdate | no fix listed | UBUNTU-CVE-2025-41259 |
Affected products (as reported)
Weakness: CWE-367 · Vector: 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