#VU107938 Stack-based buffer overflow in ICU - CVE-2025-26382

Vulnerability identifier: #VU107938

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2025-26382

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ICU
Hardware solutions / Firmware

Vendor: Johnson Controls

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ICU: before 6.9.5

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External links
https://www.cisa.gov/news-events/ics-advisories/icsa-25-114-05
https://www.johnsoncontrols.com/-/media/project/jci-global/johnson-controls/us-region/united-states-johnson-controls/cyber-solutions/security-advisories/documents/jci-psa-2025-04.pdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.