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CVE-2026-79300

Quick assessment

Affected
SEP sesam
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.

在 5.2.0.24 之前的 SEP sesam 版本中，当启用了多因素认证（MFA）并配置了 Active Directory（AD）认证时，用户授权（User Authorization）的处理存在缺陷。由于 SEP sesam 与 Active Directory 对用户名大小写的处理方式不同，攻击者可能为同一个 AD 账户创建第二个一次性密码（OTP）认证功能。具体而言，Active Directory 对用户名大小写不敏感，而 SEP sesam 则区分大小写。因此，同一个 AD 用户可能会在 SEP s

CVSS 3.5 · Low
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I. Basic Information for CVE-2026-79300

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
SEP sesam before 5.2.0.24 mishandles User Authorization with MFA. If AD authentication is configured and MFA is enforced, an attacker can create a second OTP access capability. SEP sesam and Active Directory handle username capitalization differently, which may allow multiple SEP sesam user accounts to be created for the same Active Directory (AD) account. Active Directory treats usernames as case-insensitive, while SEP sesam distinguishes between different letter casing. As a result, the same AD user can be represented by multiple SEP sesam user accounts that differ only in username capitalization. When Active Directory authentication is configured and multi-factor authentication (MFA) is enforced, this behavior may allow an additional OTP Authenticator to be registered for the same AD account, reducing the effectiveness of MFA protection.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的行为次序：规范化之前验证
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SEP sesam 1.0 ~ 5.2.0.24 -

II. Public POCs for CVE-2026-79300

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III. Intelligence Information for CVE-2026-79300

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Vendor Pages for CVE-2026-79300 (1)

IV. Related Vulnerabilities

Same weakness: CWE-180

V. Comments for CVE-2026-79300

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