What’s Vulnerable › Vulnerabilities
CVE-2026-95509: Out-of-bounds read vulnerability in string formatting impacts Qt for MCUs
- Severity: high (CVSS 8.8 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-29 · updated 2026-09-30
- Weakness: CWE-125
Description
Strings optimized for Latin-1 displaying Latin-1 characters cause incorrect String.arg() formatting by an incorrect buffer size calculation, causing out-of-bounds reading.
Affected products
- Qt for MCUs: from 2.6.0 before 2.11.3; from 2.12.0 before 2.12.3 — fixed in 2.11.3, 2.12.3
How to fix
Upgrade to a fixed version: Qt for MCUs 2.11.3, 2.12.3. Check the vendor advisory for mitigations.
References
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