CVE-2025-34191: Vasion Virtual Appliance Host privilege escalation (CVSS 8.4)

Description

Vasion Print (formerly PrinterLogic) Virtual Appliance Host versions prior to 22.0.843 and Application prior to 20.0.1923 (macOS/Linux client deployments) contain an arbitrary file write vulnerability via the response file handling. When tasks produce output the service writes response data into files under /opt/PrinterInstallerClient/tmp/responses/ reusing the requested filename. The service follows symbolic links in the responses directory and writes as the service user (typically root), allowing a local, unprivileged user to cause the service to overwrite or create arbitrary files on the filesystem as root. This can be used to modify configuration files, replace or inject binaries or drivers, and otherwise achieve local privilege escalation and full system compromise. This vulnerability has been identified by the vendor as: V-2023-019 — Arbitrary File Write as Root.

CVSS 3.1 breakdown

Attack vectorLocal

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Vasion Virtual Appliance Application< 20.0.1923

Vasion Virtual Appliance Host< 22.0.843

Remediation

Fixed in

Vasion Virtual Appliance Application≥ 20.0.1923

Vasion Virtual Appliance Host≥ 22.0.843

Patch & vendor advisories

References

https://help.printerlogic.com/saas/Print/Security/Security-Bulletins.htmVendor Advisory
https://help.printerlogic.com/va/Print/Security/Security-Bulletins.htmVendor Advisory
https://pierrekim.github.io/blog/2025-04-08-vasion-printerlogic-83-vulnerabilities.html#mac-arbitrary-file-writeExploitThird Party Advisory
https://www.vulncheck.com/advisories/vasion-print-printerlogic-arbitrary-file-write-as-root-via-response-path-symlink-followThird Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-34191 being actively exploited?

CVE-2025-34191 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.30%.

How severe is CVE-2025-34191?

CVE-2025-34191 has a CVSS 3.1 base score of 8.4, rated high. EPSS estimates a 0.30% probability of exploitation.

Which products are affected by CVE-2025-34191?

Affected products include Vasion Virtual Appliance Application, Vasion Virtual Appliance Host.

How do I fix CVE-2025-34191?

Upgrade affected software to a fixed version, for example Vasion Virtual Appliance Application 20.0.1923, Vasion Virtual Appliance Host 22.0.843 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-34191 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo