Is www.sie.udn.vn Safe? Security Score 59/100 | CyStack
www.sie.udn.vn
Squarespace - Domain Not Claimed
Industry
Science and Education / Education
Origin
Vietnam
Global rank
#19,693
Rank in Vietnam
#300
Updated at
F59/100
Security level
Low
Data confidence
High
Scope checked
97.3%
The higher the score, the more externally observable protections the system has recorded. This page does not certify that the website is reputable, legitimate, or completely free of vulnerabilities.
Is the website “www.sie.udn.vn” safe?
As of September 12, 2026 at 09:14, www.sie.udn.vn has a security score of 59/100 (grade F: “Low”). CyStack’s automated assessment recorded 12 issues to review after completing 97.3% of applicable checks. The website owner should address “Certificate matches the website” first, then review the remaining items in order of impact.
Does www.sie.udn.vn show known scam, phishing, or malware signals?
At assessment time, CyStack did not find www.sie.udn.vn or related infrastructure on any scam, phishing, or malware warning list after checking 5 online reputation sources. This result reflects external observations; it does not guarantee absolute safety or verify the organization’s legal status or reputation.
Potentially exposed domain email addressesChecks infostealer data for email addresses ending in @udn.vn, the registered domain of the assessed website www.sie.udn.vn. A record is not counted merely because someone visited or signed in to the website.0 matching email exposure records
0Matching email exposure records
0Related infected devices (estimated)
No exposure record was found for an email address ending in @udn.vn in the available data. This does not guarantee that an exposure has never occurred.
Data provided by
Frequently asked questions
What affects the security of www.sie.udn.vn?
A valid SSL certificate still does not prove that www.sie.udn.vn is safe, legitimate, or free of scam signals. For a more complete assessment, this report also checks phishing and malware, exposed email records, IPs and open ports, subdomains, technologies, and CVEs that may apply to observed versions.
Does www.sie.udn.vn use HTTPS, and is its SSL certificate valid?
HTTPS on www.sie.udn.vn presented a certificate that was invalid or failed verification. The operator should review its validity dates, domain names, and trust chain.
Data compiled from CyStack cybersecurity monitoring systems
CyStack compiles scan results from its internal cybersecurity monitoring systems, including CyStack VulnScan and CyStack Threat Intelligence, together with publicly available Internet data. The assessment only observes and analyzes information already available; it does not attempt unauthorized access, test passwords, send exploit code, or change or disrupt the assessed system.
These 3 failed checks or warnings have the greatest impact on the result for www.sie.udn.vn.
Certificate matches the websiteThe certificate does not match the requested target.Critical
Why it matters
The certificate must list the exact hostname visitors requested in its Subject Alternative Names (SAN). A mismatch produces browser warnings because the certificate may belong to a different service.
What to do
Issue and deploy a certificate whose SAN list includes every public hostname served by this website address.
Diagnostic information
The available certificate evidence was not sufficient to conclude this certificate requirement.
Evidence and check scope
Assessed domain:
www.sie.udn.vn
Certificate domain names:
*.squarespace.com, squarespace.com, *.campaign-preferences.com, campaign-preferences.com, *.sqsp.net, sqsp.net, *.sqspcdn.com, static1.1.sqspcdn.com, static2.1.sqspcdn.com, static1.2.sqspcdn.com… and 4 more
Host requested:
www.sie.udn.vn
Resolved IPs tested:
198.185.159.144
IP that returned the observed result:
198.185.159.144
Allowed browser content (CSP)The inspected root HTML response does not include a Content-Security-Policy header.High
Why it matters
Content Security Policy (CSP) limits where scripts, styles, frames, and other browser content may come from. A strong policy reduces the impact if an attacker manages to inject content into a page.
What to do
Define only the sources the application needs, test the policy before activating it, and avoid broad wildcard (*) rules, unsafe-inline, and unsafe-eval where possible.
Email spoofing protection (DMARC)No DMARC record was found for the registrable email domain.High
Why it matters
DMARC lets the domain owner tell receiving services what to do when the visible From address is not verified by SPF or DKIM. Without DMARC, attackers have more opportunity to impersonate the domain in phishing email.
What to do
Publish a DMARC record at _dmarc, begin by collecting reports, and confirm that legitimate senders pass before applying a blocking policy.
Discovered subdomains (540+)Subdomains of udn.vn, the registered domain of the assessed website www.sie.udn.vn. Sensitive-looking names are shown first; individual subdomains have not been separately security-tested.Partial
Public web contextThe website title, description, industry and popularity.Website rankings and industry category are based on data from Similarweb
Page title
Squarespace - Domain Not Claimed
Website category
Science and Education / Education
Description
–
Global rank
#19,693
Rank in Vietnam
#300
Rank in industry
#18
Final URL
https://www.sie.udn.vn/
This is a quick, point-in-time check from outside the organization. It can surface visible risks, but it does not replace penetration testing or an authenticated assessment.
Have @udn.vn email addresses appeared in exposed data or information-stealer (infostealer) logs?
No record associated with an @udn.vn email address was found in the currently available data. This does not rule out incidents that have not been observed.
Which public IPs, services, and ports does www.sie.udn.vn expose?
The assessment observed 4 public IPs and 8 open ports for www.sie.udn.vn. An open port is not the same as a vulnerability, but the website owner should keep every public service updated and appropriately restrict access.
How many subdomains of udn.vn have been discovered?
The assessment observed 540+ public subdomains of udn.vn. This list can reveal additional entry points such as APIs, administration systems, or test environments, but it does not mean that every subdomain is risky.
Industry
Updated at 
Vietnam
