CVE-2026-94055
Quick assessment
Affected
Exim Exim
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Exim 在 4.100.1 之前版本中，若在使用 GnuTLS 时启用了某些非默认的 TLS 设置，存在一个释放后使用（use-after-free）漏洞。
Possible ATT&CK Techniques 1 AI
T1595 · Active Scanning
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I. Basic Information for CVE-2026-94055
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-94055
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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Mailing List Discussions for CVE-2026-94055 (1)
Same Patch Batch · Exim · 2026-09-19 · 4 CVEs total
| CVE-2026-94056 | 7.5 HIGH | Exim 4.100.1前 Proxy-Protocol 栈未初始化读取 |
| CVE-2026-94054 | 7.0 HIGH | Exim 4.100.1前Proxy-Protocol致越界写入 |
| CVE-2026-94057 | 4.0 MEDIUM | Exim 4.100.1 前 SMTP 走私漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-94055
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