Is CVE-2026-5261 actively exploited?

No active exploitation of CVE-2026-5261 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5261 be exploited remotely?

Yes. CVE-2026-5261 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5261?

CVE-2026-5261 has a CVSS score of 7.3 (HIGH).

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HIGH

CVE-2026-5261

CWE-284Published: April 1, 2026· Updated: Apr 1, 2026

7.3

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.5th

Official Description

A vulnerability was identified in Shandong Hoteam InforCenter PLM up to 8.3.8. The impacted element is the function uploadFileToIIS of the file /Base/BaseHandler.ashx. The manipulation of the argument File leads to unrestricted upload. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

NVD Source

Technical Analysis

CVE-2026-5261 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.