CVE-2025-41259Public exploit

Root code execution via reused temporary script directory

Published Jun 3, 2026 · Updated Jun 3, 2026

TOCTOU in SWUpdate before 2026.05 allows local users to execute untrusted update scripts as root through a signed update. SWUpdate reuses an attacker-created /tmp/scripts directory, hashes each extracted script, then executes it later without rechecking after replacement. A low-privilege shell user must win the gap between integrity verification and execution; success grants root code execution and update-file tampering.

CVSS severity7.3
High
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

TOCTOU in SWUpdate before 2026.05 allows local users to execute untrusted update scripts as root through a signed update. SWUpdate reuses an attacker-created /tmp/scripts directory, hashes each extracted script, then executes it later without rechecking after replacement. A low-privilege shell user must win the gap between integrity verification and execution; success grants root code execution and update-file tampering.

The record

CVE
CVE-2025-41259
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
SWUpdate
Product
SWUpdate
Classifications
CWE-367, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2026.05

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

SWUpdate · SWUpdateversion=0 <2026.05

Published CVSS scores

7.3SBA ResearchCVSS: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 describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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