Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
XML Notepad is a Windows program that provides a simple intuitive User Interface for browsing and editing XML documents. Prior to version 2.9.0.21, XML Notepad does not disable DTD processing by default which means external entities are resolved automatically. There is a well known attack related to malicious DTD files where an attacker to craft a malicious XML file that loads a DTD that causes XML Notepad to make outbound HTTP/SMB requests, potentially leaking local file contents or capturing the victim's NTLM credentials. This issue has been patched in version 2.9.0.21.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
| Date | Total | Labels |
|---|
| 2026-03-31 | 1 | Disclosure1 |
| 2026-04-01 | 1 | General1 |
CVE-2026-34401 XML Notepad is a Windows program that provides a simple intuitive User Interface for browsing and editing XML documents. Prior to version 2.9.0.21, XML Notepad does n… https://www.cve.org/CVERecord?id=CVE-2026-34401
Post summary
The text references CVE-2026-34401 with minimal context and lacks detailed information on the vulnerability or exploitation.
⚡ CVE-2026-34401: XML Notepad: XML External Entity... XXE in XML Notepad enables NTLM credential theft via malicious DTD—drop a crafted XML file and watch SMB auth fly to yo... https://zerodaysignal.com/vulnerability/CVE-2026-34401 #netsec #vulnerability #CVE #sysadmin #zeroday
Post summary
The brief note discloses CVE-2026-34401, an XXE flaw in XML Notepad that can lead to NTLM credential theft, but it provides no PoC, exploit code, patch, or evidence of active exploitation.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | microsoft | xml_notepad | - | windows | - |