What is CVE-2026-5261?

CVE-2026-5261 is a high-severity vulnerability in Shandong Hoteam Inforcenter Plm, classified under Improper Access Control. CVSS score: 7.3/10. Published 2026-04-01.

How severe is CVE-2026-5261?

High severity. CVSS v3 base score is 7.3 out of 10.

Arbitrary file upload in Shandong Hoteam Inforcenter Plm

CVE-2026-5261

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.

Published 2026-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (38.6th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Shandong Hoteam Inforcenter Plm — versions 8.3.0, 8.3.1, 8.3.2

Weakness classification (CWE)

References

vuldb.com/vuln/354450 (technical-description, vdb-entry)
vuldb.com/vuln/354450/cti (signature, permissions-required)
vuldb.com/submit/780725 (third-party-advisory)
my.feishu.cn/docx/ToGkdd5jwokb4PxEMkHcKrfXn3b (exploit)

Frequently asked questions

What is CVE-2026-5261?: CVE-2026-5261 is a high-severity vulnerability in Shandong Hoteam Inforcenter Plm, classified under Improper Access Control. CVSS score: 7.3/10. Published 2026-04-01.
How severe is CVE-2026-5261?: High severity. CVSS v3 base score is 7.3 out of 10.