Yonyou U8 Cloud contains an unauthenticated Java deserialization vulnerability in the nc.impl.pub.filesystem.FileManageServlet component that allows remote unauthenticated attackers to execute arbitrary OS commands by sending a serialized payload via POST request. Attackers can exploit the doAction method, which passes raw HTTP request body data directly to ObjectInputStream.readObject() without filtering, to achieve remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-02-13.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Yonyou U8 Cloud unaffected
Version Status Constraints
1.0 affected —
2.0 affected —
2.1 affected —
2.3 affected —
2.5 affected —
2.6 affected —
2.65 affected —
2.7 affected —
3.0 affected —
3.1 affected —
3.2 affected —
3.5 affected —
3.6 affected —
3.6sp affected —

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://avd.aliyun.com/detail?id=AVD-2023-1686894 cve-icon cve-icon
https://blog.csdn.net/qq_41904294/article/details/134277353 cve-icon cve-icon
https://cn-sec.com/archives/2182384.html cve-icon cve-icon
https://security.yonyou.com/#/noticeInfo?id=400 cve-icon cve-icon
https://www.vulncheck.com/advisories/yonyou-u8-cloud-java-deserialization-rce-via-filemanageservlet cve-icon cve-icon
https://www.yonyou.com/Global/ cve-icon cve-icon
History

Tue, 15 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Tue, 15 Sep 2026 17:00:00 +0000

Type Values Removed Values Added
Description Yonyou U8 Cloud contains an unauthenticated Java deserialization vulnerability in the nc.impl.pub.filesystem.FileManageServlet component that allows remote unauthenticated attackers to execute arbitrary OS commands by sending a serialized payload via POST request. Attackers can exploit the doAction method, which passes raw HTTP request body data directly to ObjectInputStream.readObject() without filtering, to achieve remote code execution. Exploitation evidence was first observed by the Shadowserver Foundation on 2025-02-13.
Title Yonyou U8 Cloud Java Deserialization RCE via FileManageServlet
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-15T17:30:23.072Z

Reserved: 2026-09-15T16:26:30.768Z

Link: CVE-2023-54398

cve-icon Vulnrichment

Updated: 2026-09-15T17:30:19.178Z

cve-icon NVD

Status : Received

Published: 2026-09-15T17:17:08.343

Modified: 2026-09-15T18:17:10.417

Link: CVE-2023-54398

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses