Is CVE-2026-47273 actively exploited?

No active exploitation of CVE-2026-47273 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-47273 be exploited remotely?

Yes. CVE-2026-47273 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-47273?

CVE-2026-47273 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-47273

CWE-91Published: May 27, 2026· Updated: May 28, 2026

6.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:14.3th

Official Description

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, pam_usb builds XPath expressions from user-supplied identifiers (PAM username, service name) and device-supplied identifiers (USB device serial, model, vendor) to query /etc/pamusb.conf. These identifiers were not validated for XPath metacharacters, allowing injection of arbitrary XPath predicates. This vulnerability is fixed in 0.9.0.

NVD Source

Technical Analysis

CVE-2026-47273 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 6.5.