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CVE-2026-8811— Path traversal in PDF generation module

Quick assessment

Affected
SEPPmail AG Secure Email Gateway
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.

SEPPmail AG Secure Email Gateway是SEPPmail AG的邮件安全网关。 SEPPmail Secure Email Gateway 15.0.5之前版本存在路径遍历漏洞，该漏洞源于处理加密PDF生成时对附件文件名处理不当，可能导致攻击者在目标目录之外创建新文件，可能将文件放置到Web可访问位置。

AI Predicted 7.5 Difficulty: Easy EPSS 0.44% · P37

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
SEPPmail AG Secure Email Gateway < 15.0.5 affected
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I. Basic Information for CVE-2026-8811

Vulnerability Information
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Vulnerability Title
Path traversal in PDF generation module
Source: CVE Program / CVE List V5
Vulnerability Description
SEPPmail versions before 15.0.5 allow improper handling of attachment filenames during encrypted PDF generation. An attacker can exploit this to create new files outside the intended directory, potentially placing files in web-accessible locations.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
SEPPmail AG Secure Email Gateway 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SEPPmail AG Secure Email Gateway是SEPPmail AG的邮件安全网关。 SEPPmail Secure Email Gateway 15.0.5之前版本存在路径遍历漏洞，该漏洞源于处理加密PDF生成时对附件文件名处理不当，可能导致攻击者在目标目录之外创建新文件，可能将文件放置到Web可访问位置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SEPPmail AG Secure Email Gateway 0 ~ 15.0.5 -

II. Public POCs for CVE-2026-8811

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III. Intelligence Information for CVE-2026-8811

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IV. Related Vulnerabilities

Same product: Secure Email Gateway
Same vendor: SEPPmail AG
Same weakness: CWE-22

V. Comments for CVE-2026-8811

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