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CVE-2026-103680— Tnef: heap buffer overflow in find_free_number() via numbered-backup suffix generation

一分钟漏洞结论

影响对象
CVE-2026-103680
利用判断
尚无明确在野利用证据,仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本;无法立即升级时,限制受影响服务暴露并加强监测。

A flaw was found in tnef. A heap-based buffer overflow can occur in the find_free_number() function when generating numbered backup suffixes for duplicate filenames. When numbered backups are enabled and file overwriting is disabled, an attacker can supply a s

CVSS 3.1 · Low

一、 漏洞 CVE-2026-103680 基础信息

漏洞信息

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Vulnerability Title
Tnef: heap buffer overflow in find_free_number() via numbered-backup suffix generation
来源: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in tnef. A heap-based buffer overflow can occur in the find_free_number() function when generating numbered backup suffixes for duplicate filenames. When numbered backups are enabled and file overwriting is disabled, an attacker can supply a specially crafted Transport Neutral Encapsulation Format (TNEF) file with an excessive number of colliding attachment filenames, causing the numeric counter to write past the allocated memory buffer. This issue may result in an application crash, leading to a Denial of Service (DoS), or potentially arbitrary code execution.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
- - 0 ~ 1.4.18 -

二、漏洞 CVE-2026-103680 的公开POC

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三、漏洞 CVE-2026-103680 的情报信息

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CVE-2026-103680 其他参考 (3)

IV. Related Vulnerabilities

V. Comments for CVE-2026-103680

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