CVE-2026-59105 (GCVE-0-2026-59105)

Vulnerability from cvelistv5 – Published: 2026-11-06 14:09 – Updated: 2026-11-06 15:21
VLAI
Title
Universal sysadmin credential vulnerability in Jumis
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 14:55 UTC
CWE
  • CWE-1391 - Use of Weak Credentials
  • CWE-547 - Use of hard-coded, security-relevant constants
Assigner
ENISA CNA
References
Impacted products
Vendor Product Version
Jumis Pro SIA Jumis Affected: 0 , < TJ7.0.141.36 (custom)
Create a notification for this product.
Credits
OffSeq Cybersecurity (https://offseq.com)
Show details on NVD website
To clipboard 

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