DASYLab EUVD-2026-70769

Exploitation requires a user with DASYLab installed to open a specially crafted .DSB file - this is the sole mandatory precondition. The attack vector is entirely local and file-based (AV:L, UI:P in CVSS 4.0); there is no network-reachable attack surface and no daemon or service to target remotely. The attacker does not need any authentication, account, or pre-existing system access. The principal limiting factor is the social-engineering step: the attacker must deliver the malicious file and persuade the victim to open it, which constrains automated or mass exploitation. No non-default configuration is required - any user who can open .DSB files in any DASYLab installation below 2026.0.0 is a valid target.

The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H) accurately reflects the threat model: exploitation is local and file-based, requiring passive user interaction (opening the .DSB file), but once triggered, impact is full compromise of the vulnerable system with high confidentiality, integrity, and availability loss. The low attack complexity and absence of any privilege requirement or special attack condition mean that even a mid-sized industrial IT team in walbrzych operating legacy DASYLab installations should treat this as urgent, since a single phishing email with a malicious .DSB attachment is a plausible delivery vector. No EPSS score is available in the input data, and neither CISA KEV listing nor public proof-of-concept code has been identified, which moderates the immediacy of mass exploitation risk. However, DASYLab's industrial/scientific user base - which may include operators less accustomed to treating data files as potential attack surfaces - elevates the social-engineering feasibility above average. The CVSS 4.0 score of 8.5 is appropriate given full triad impact, though the file-delivery dependency limits automated/opportunistic exploitation.

An attacker crafts a malicious DASYLab .DSB project file with a heap-overflowing data field and delivers it to a target engineer or technician via email, USB drop, or a compromised file-sharing platform. The victim opens the file in their unpatched DASYLab installation, triggering the out-of-bounds write, which the attacker leverages via heap-shaping techniques to redirect execution and deploy a payload such as a reverse shell or data-exfiltration implant. No public proof-of-concept has been identified, but the well-understood CWE-787 class makes independent exploit development feasible for skilled adversaries.