#VU121146 Stack-based buffer overflow in unrtf - CVE-2025-65410

Vulnerability identifier: #VU121146

Vulnerability risk: Medium

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-65410

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
unrtf
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a boundary error when processing filenames. A remote attacker can pass a specially crafted filename to the application, trigger a stack-based buffer overflow and perform a denial of service attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

unrtf: 0.18.1 - 0.21.10

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External links
https://github.com/MAXEUR5/Vulnerability_Disclosures/blob/main/2025/CVE-2025-65410.md
https://hg.savannah.gnu.org/hgweb/unrtf/rev/a5d3b025a8b1
https://lists.gnu.org/archive/html/bug-unrtf/2025-11/msg00001.html

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?