Vulnerability · CVE-2026-55480
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems.
Published Oct 15, 2026 · corrected/updated Oct 15, 2026 · OpenPrinting cups · evidence confidence high
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a symlink before the root open, while a privileged add-printer or modify-printer operation using a model PPD triggers copy_model(). The reporter treats an existing lp foothold and the privileged operation as distinct prerequisites, while the maintainer assesses high privileges because installing the relevant filter or administering the printer requires root or print-administrator access. If the race succeeds, the root scheduler follows the symlink and truncates or overwrites a root-writable target with generated PPD data, compromising file integrity or availability. This issue is fixed in version 2.4.20.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-55480 is a medium public vulnerability record for OpenPrinting cups. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether OpenPrinting cups is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: cups (2.4.10-1, 2.4.10-2, 2.4.10-3); cups (2.4.10-3, 2.4.10-3+deb13u1, 2.4.10-3+deb13u2); cups (2.4.10-3, 2.4.10-4, 2.4.14-1); OpenPrinting cups. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 5.7, EPSS 0.2%. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-377, CWE-59. Sources contributing to this record: cve_org, epss, nvd, osv. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Oct 15, 2026 · NIST NVD
Detected
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a sy
Oct 15, 2026 · OpenSSF OSV / OSV Scanner
Updated
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Exploitation requires an lp-group process able to write that directory to predict the connection-derived name and plant a sy
Affected
- Debian:12 cups2.4.10-1, 2.4.10-2, 2.4.10-3
- Debian:13 cups2.4.10-3, 2.4.10-3+deb13u1, 2.4.10-3+deb13u2
- Debian:14 cups2.4.10-3, 2.4.10-4, 2.4.14-1
- vendor OpenPrinting cupsversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-55480
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL or O_NOFOLLOW. Expl
cve.org - FIRST EPSSExploitation probabilityCVE-2026-55480
30-day exploitation probability 0.2%
first.org - NIST NVDVulnerability recordCVE-2026-55480
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_model() in scheduler/ipp.c creates a predictable TempDir/ .ppd path in an lp-group-writable directory and opens it as root without O_EXCL o
nvd.nist.gov - OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-55480osv.dev