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    CVE-2026-58221

    A flaw was found in Samba Active Directory Domain Controller (AD DC). Improper authorization checks allow an authenticated low-privilege domain user to modify internal LDB special records through LDAP. By altering the DSDB module configuration, an attacker can bypass directory ACL enforcement on new LDAP connections and elevate privileges, potentially leading to complete domain compromise.

    Published:Jul 28, 2026
    Last Modified:Jul 31, 2026
    EPS:N/A
    EPSS Score:
    CVSS Score:8.8

    Affected Products

    Vendor
    Samba
    Product
    Samba

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-284 Improper Access Control

    Related CVEs

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    CVE-2026-58222 (CVSS 8.8) — A security flaw combining LDAP filter injection and improper authorization checks was found in Samba Active Di…
    CVE-2026-58218 (CVSS 5.3) — A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration requests were added to…
    CVE-2026-58216 (CVSS 5.3) — An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpas…
    CVE-2026-6949 (CVSS 7.5) — No description is available for this CVE.…
    CVE-2026-15779 (CVSS 6.1) — A flaw was found in samba's pam_winbind. When mkhomedir is enabled, pam_winbind chowns the target account's ho…
    CVE-2026-3238 (CVSS 7.5) — A flaw was found in Samba’s WINS server component when running as an Active Directory Domain Controller. The W…
    CVE-2026-1933 (CVSS 7.1) — A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. D…
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    References

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High