Vulnerability in Microsoft Windows
CVE-2025-34193
Vasion Print (formerly PrinterLogic) Virtual Appliance Host versions prior to 25.1.102 and Application versions prior to 25.1.1413 include Windows client components (PrinterInstallerClientInterface.exe, PrinterInstallerClient.exe, PrinterInstallerClientLauncher.exe) that lack modern compile-time and runtime exploit mitigations and rely on outdated runtimes. These binaries are built as 32-bit, without Data Execution Prevention (DEP), Address Space Layout Randomization (ASLR), Control Flow Guard (CFG), or stack-protection, and they incorporate legacy technologies (Pascal/Delphi and Python 2) which are no longer commonly maintained. Several of these processes run with elevated privileges (NT AUTHORITY\SYSTEM for PrinterInstallerClient.exe and PrinterInstallerClientLauncher.exe), and the client automatically downloads and installs printer drivers. The absence of modern memory safety mitigations and the use of unmaintained runtimes substantially increase the risk that memory-corruption or other exploit primitives — for example from crafted driver content or maliciously crafted inputs — can be turned into remote or local code execution and privilege escalation to SYSTEM. This vulnerability has been confirmed to be remediated, but it is unclear as to when the patch was introduced.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- help.printerlogic.com/saas/Print/Security/Security-Bulletins.htm (product, Vendor Advisory)
- pierrekim.github.io/blog/2025-04-08-vasion-printerlogic-83-vulnerabilities.html (Exploit, technical-description, Third Party Advisory)
- help.printerlogic.com/va/Print/Security/Security-Bulletins.htm (product, Vendor Advisory)
- www.vulncheck.com/advisories/vasion-print-printerlogic-insecure-windows-compone… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-34193?
- CVE-2025-34193 is a critical-severity vulnerability in Microsoft Windows, classified under Improper Handling of Exceptional Conditions. CVSS score: 9.8/10. Published 2025-09-19.
- How severe is CVE-2025-34193?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-34193 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.