Description
An attachment spoofing issue in WhatsApp for Windows prior to v2.3000.1032164386.258709 could have allowed maliciously formatted documents with embedded NUL bytes in the filename to be shown in the application as one type of file but run as an executable when opened. We have not seen evidence of exploitation in the wild.
Affected products
whatsapp: whatsapp
References2
- www.whatsapp.com/security/advisories/2026 Vendor Advisory
- www.facebook.com/security/advisories/cve-2026-23863 Third Party Advisory
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 1% percentile: 45 · as of 13 November 2026
- CWE
- CWE-158
Could this be exploited in your environment?
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