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I. Basic Information for CVE-2026-27443
Vulnerability Information

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Vulnerability Title
S/MIME Decryption Tag Sanitization Bypass
Source: NVD (National Vulnerability Database)
Vulnerability Description
SEPPmail Secure Email Gateway before version 15.0.1 does not properly sanitize the headers from S/MIME protected MIME entities, allowing an attacker to control trusted headers.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
SEPPmail Secure Email Gateway 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SEPPmail Secure Email Gateway是德国SEPPmail公司的一个电子邮件安全网关。 SEPPmail Secure Email Gateway 15.0.1之前版本存在安全漏洞,该漏洞源于未正确清理来自S/MIME受保护MIME实体的标头,可能导致攻击者控制受信任标头。
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
VendorProductAffected VersionsCPESubscribe
SEPPmailSecure Email Gateway 0 ~ 15.0.1 -
II. Public POCs for CVE-2026-27443
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III. Intelligence Information for CVE-2026-27443
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IV. Related Vulnerabilities
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