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VulnerabilityPublished Updated

CVE-2025-4960: EPSON Printer Controller Installer · Incorrect Authorization

Affects EPSON Printer Controller InstallerSource CVE Database V5

0

Not known to be exploited · CVSS 7.8 High.

Data as of 26 Oct 2026, 11:07 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
EPSONEPSON Printer Controller InstallerAffected
  • <=1.0.0
Fixed in–

AI-suggested

  1. EPSON should be engaged to provide an official patch or updated installer that correctly implements authorization checks and restricts custom rights appropriately. Until a patch is available, organizations should consider uninstalling or disabling the EPSON Printer Controller Installer on macOS systems where feasible.
  2. Restrict local user access to macOS systems, enforcing strict access controls and monitoring for unauthorized local logins.
  3. Use macOS security tools to audit and monitor the /var/db/auth.db authorization database for unauthorized changes or overly permissive rights registrations.
  4. Employ endpoint detection and response (EDR) solutions to detect anomalous process executions or privilege escalation attempts related to the com.epson.InstallNavi.helper tool.
  5. Implement application whitelisting to prevent unauthorized execution of the vulnerable helper tool or related components.
  6. Educate users about the risks of local access and enforce least privilege principles to minimize the number of users with local login capabilities.
  7. Monitor security advisories from EPSON and macOS vendors for updates and promptly apply patches once released.

Description

The com.epson.InstallNavi.helper tool, deployed with the EPSON printer driver installer, contains a local privilege escalation vulnerability due to multiple flaws in its implementation. It fails to properly authenticate clients over the XPC protocol and does not correctly enforce macOS’s authorization model, exposing privileged functionality to untrusted users. Although it invokes the AuthorizationCopyRights API, it does so using overly permissive custom rights that it registers in the system’s authorization database (/var/db/auth.db). These rights can be requested and granted by the authorization daemon to any local user, regardless of privilege level. As a result, an attacker can exploit the vulnerable service to perform privileged operations such as executing arbitrary commands or installing system components without requiring administrative credentials.

References

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