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CVE-2026-19852— CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload

Quick assessment

Affected
CyberTutor NewSiteServer (NSS)
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CyberTutor NewSiteServer是中国CyberTutor公司的一款网站服务器设备。 CyberTutor NewSiteServer 所有版本存在任意文件上传漏洞，该漏洞源于任意文件上传漏洞，可能导致未经身份验证的远程攻击者上传任意文件，包括恶意HTML文件，从而实现类似跨站脚本攻击的效果。

CVSS 6.1 · Medium EPSS 0.23% · P14

Affected Version Matrix 1

VendorProduct Version RangeStatus
CyberTutor NewSiteServer (NSS) all affected
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I. Basic Information for CVE-2026-19852

Vulnerability Information
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Vulnerability Title
CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload
Source: CVE Program / CVE List V5
Vulnerability Description
NewSiteServer (NSS) developed by CyberTutor has an Arbitrary File Upload vulnerability. Unauthenticated remote attackers can upload arbitrary files, including malicious HTML files, thereby achieving effects similar to cross-site scripting.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
CyberTutor NewSiteServer 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CyberTutor NewSiteServer是中国CyberTutor公司的一款网站服务器设备。 CyberTutor NewSiteServer 所有版本存在任意文件上传漏洞，该漏洞源于任意文件上传漏洞，可能导致未经身份验证的远程攻击者上传任意文件，包括恶意HTML文件，从而实现类似跨站脚本攻击的效果。
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
CyberTutor NewSiteServer (NSS) all -

II. Public POCs for CVE-2026-19852

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
default-local-qwen3.6 · 8706 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-19852

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Vendor Advisories for CVE-2026-19852 (2)

IV. Related Vulnerabilities

Same product: NewSiteServer (NSS)
Same vendor: CyberTutor
Same weakness: CWE-434

V. Comments for CVE-2026-19852

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