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CVE-2026-16999— XXE in Ministry of Justice's UYAP Document Editor

Quick assessment

Affected
Ministry of Justice UYAP Document Editor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ministry of Justice UYAP Document Editor是Ministry of Justice政府部门的一款文档编辑软件。 Ministry of Justice UYAP Document Editor 4.5.17版本至5.4.17之前版本存在输入验证错误漏洞，该漏洞源于XML外部实体引用限制不当，可能导致序列化数据外部链接。

CVSS 6.3 · Medium EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
Ministry of Justice UYAP Document Editor 4.5.17< 5.4.17 affected
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I. Basic Information for CVE-2026-16999

Vulnerability Information
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Vulnerability Title
XXE in Ministry of Justice's UYAP Document Editor
Source: CVE Program / CVE List V5
Vulnerability Description
Improper restriction of XML external entity reference vulnerability in Ministry of Justice UYAP Document Editor allows Serialized Data External Linking. This issue affects UYAP Document Editor: from 4.5.17 before 5.4.17.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5
Vulnerability Title
Ministry of Justice UYAP Document Editor 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ministry of Justice UYAP Document Editor是Ministry of Justice政府部门的一款文档编辑软件。 Ministry of Justice UYAP Document Editor 4.5.17版本至5.4.17之前版本存在输入验证错误漏洞，该漏洞源于XML外部实体引用限制不当，可能导致序列化数据外部链接。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Ministry of Justice UYAP Document Editor 4.5.17 ~ 5.4.17 -

II. Public POCs for CVE-2026-16999

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III. Intelligence Information for CVE-2026-16999

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Vendor Advisories for CVE-2026-16999 (1)

IV. Related Vulnerabilities

Same product: UYAP Document Editor
Same vendor: Ministry of Justice
Same weakness: CWE-611

V. Comments for CVE-2026-16999

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