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    2 vulnerabilities found for Mail Assure by N-able

    CVE-2025-68624 (GCVE-0-2025-68624)

    Vulnerability from nvd – Published: 2026-09-14 00:00 – Updated: 2026-09-17 16:14 Disputed Exclusively Hosted Service
    VLAI
    Summary
    N-able Mail Assure through April 2026 contains a design-level authorization flaw that allows an authenticated SMTP user to send outbound email using MAIL FROM addresses belonging to other tenants. When connecting to the SMTP TCP port and performing SMTP AUTH with valid credentials, the server accepts arbitrary sender domains without enforcing any domain-to-account binding. As a result, an attacker from any tenant can impersonate other tenant domains, producing messages that pass SPF and DMARC validation. NOTE: N-able's position is that the behavior is intended functionality of its shared SMTP relay architecture and that the service does not represent that it enforces per-tenant sender-domain binding.
    Severity
    4.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-17 16:14 UTC
    CWE
    • CWE-290 - Authentication Bypass by Spoofing
    Assigner
    References
    Impacted products
    Vendor Product Version
    N-able Mail Assure Affected: 0 , ≤ April 2026 (custom)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2025-68624 (GCVE-0-2025-68624)

    Vulnerability from cvelistv5 – Published: 2026-09-14 00:00 – Updated: 2026-09-17 16:14 Disputed Exclusively Hosted Service
    VLAI
    Summary
    N-able Mail Assure through April 2026 contains a design-level authorization flaw that allows an authenticated SMTP user to send outbound email using MAIL FROM addresses belonging to other tenants. When connecting to the SMTP TCP port and performing SMTP AUTH with valid credentials, the server accepts arbitrary sender domains without enforcing any domain-to-account binding. As a result, an attacker from any tenant can impersonate other tenant domains, producing messages that pass SPF and DMARC validation. NOTE: N-able's position is that the behavior is intended functionality of its shared SMTP relay architecture and that the service does not represent that it enforces per-tenant sender-domain binding.
    Severity
    4.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-09-17 16:14 UTC
    CWE
    • CWE-290 - Authentication Bypass by Spoofing
    Assigner
    References
    Impacted products
    Vendor Product Version
    N-able Mail Assure Affected: 0 , ≤ April 2026 (custom)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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