SB2026050620 - Attachment spoofing in WhatsApp for Windows Desktop
Published: May 6, 2026
Security Bulletin ID
SB2026050620
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Attachment spoofing (CVE-ID: CVE-2026-23863)
CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of attachments with embedded NUL bytes in the filename. A remote attacker can force the application to show a file to be of one type but once clicked will run as an executable, leading to a potential system compromise.
Remediation
Install update from vendor's website.