Vulnerability · Published Aug 24, 2026 · Assigned by twcert
CVE-2026-19852CyberTutor｜NewSiteServer (NSS) - Arbitrary File Upload
Medium 6.1
In plain English
A medium-severity unrestricted file upload in NewSiteServer (NSS) from CyberTutor. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.3%top 74.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CyberTutor | NewSiteServer (NSS) | all |
Weakness: CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- https://www.twcert.org.tw/tw/cp-132-11116-2c1d8-1.html third-party-advisory
- https://www.twcert.org.tw/en/cp-139-11120-64c52-2.html third-party-advisory