CVE-2026-23863 json
An attachment spoofing issue in WhatsApp for Windows prior to v2.3000.1032164386.258709 could have allowed maliciously formatted documents…
published 2026-05-01 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-26665
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Facebook WhatsApp Desktop for Windows 2.3000.1032164386.258709
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:F/RL:O/RC:C |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
Affected products
- Facebook WhatsApp Desktop for Windows
Classification
- Weakness
-
- CWE-158 Improper Neutralization of Null Byte or NUL Character
References
-
whatsapp.com
/security/advisories/2026
vendor-advisory
-
facebook.com
/security/advisories/cve-2026-23863
third-party-advisory
Sources
- CVE List CVE-2026-23863
- NVD CVE-2026-23863
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