CVE-2026-59105

9.8 CRITICAL

Published 2026-11-06 · Updated 2026-11-06

AI risk analysis

Summary: Jumis hard-codes a deterministic password for the sysadmin-privileged SQL login ##Tilde_JumisAdmin## using only the non-secret SQL Server name and a fixed secret key, allowing any network-accessible attacker to compute the password and gain full database and OS control via xp_cmdshell.
Exploitability: Trivial to exploit over the network with no authentication or user interaction required, as the server name is discoverable via standard SQL Server discovery mechanisms (UDP 1434, TDS pre-login, DNS/NetBIOS).
Blast radius: Any attacker who can reach the SQL Server instance gains sysadmin privileges and full read/write access to all customer accounting databases, plus OS-level command execution on the database server.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to Jumis version 2.590 or later, which removes the hard-coded password derivation and enforces unique, non-deterministic credentials per instance.

sql-injectionauth-bypassprivilege-escalationrcehardcoded-credentials

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

Jumis (formerly Tildes Jumis) creates and uses a Microsoft SQL Server login named ##Tilde_JumisAdmin## whose password is derived deterministically from a single non-secret input - the SQL Server name (@@servername). The derivation algorithm is hard-coded in the client application and is identical across every installation; it contains a hard-coded secret key for entropy. Because the only input (the server name) is not secret - the instance suffix is hard-coded and the host name is discoverable via the SQL Server Browser service (UDP 1434), the TDS pre-login response, or DNS/NetBIOS - any party able to reach a Jumis SQL Server can compute the password offline and authenticate. The ##Tilde_JumisAdmin## login is a member of the sysadmin server role. Successful authentication therefore grants full administrative control of the SQL Server instance and read/write access to every customer's accounting database hosted on it. The on-premise server installation also programmatically enables xp_cmdshell during routine operation, so sysadmin access escalates to operating-system command execution on the database server.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-547, CWE-1391

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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