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CVE-2026-103903

MikroTik RouterOS WinBox split-principal authentication bypass allows privilege escalation PUBLISHED

Description (CNA)

An incorrect authorization vulnerability in the WinBox authentication flow of MikroTik RouterOS allows a remote authenticated attacker with credentials for a low-privilege account permitted to use WinBox to obtain the authorization policy of a different existing account. The stage-one EC-SRP challenge and proof are verified using the attacker's account, while the independently supplied stage-two username is used to install the target account's privileges. By specifying a higher-privilege account such as admin, a low-privilege user can obtain a full administrative session without knowing the target account's password and can use that session to increase the privileges of the attacker's own account.

Affected (CNA)

Vendor / productVersions
MikroTik / RouterOSaffected 7.0.0 before 7.24.5; unaffected 7.25rc1

CWE

CWE-863

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.