Vulnerability · Published Aug 24, 2026 · Assigned by twcert
CVE-2026-19853CyberTutor｜NewSiteServer (NSS) - Missing Authentication
Medium 5.3
In plain English
A medium-severity missing authentication 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 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 58.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
NewSiteServer (NSS) developed by CyberTutor has a Missing Authentication vulnerability. Unauthenticated remote attackers can exploit a specific functionality to send emails to anyone on behalf of the school.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| CyberTutor | NewSiteServer (NSS) | all |
Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://www.twcert.org.tw/tw/cp-132-11117-4f503-1.html third-party-advisory
- https://www.twcert.org.tw/en/cp-139-11121-51e56-2.html third-party-advisory