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CVE-2026-23863VulnerabilityPublished

WhatsApp · Attachment Spoofing Issue

Source GCVE Database

0
Authoritative record:CVE-2026-23863· Medium 6.5

Public exploit available · CVSS 6.5 Medium : upgrade to 2.3000.1032164386.258709 as a priority.

Data as of 27 Oct 2026, 00:07 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 2.3000.1032164386.258709
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: evidence found.

    CVSS exploit maturity: proof of concept public

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade WhatsApp Desktop for Windows to 2.3000.1032164386.258709.

Affected software

ProductAffectedFixed in
FacebookWhatsApp Desktop for WindowsAffected
  • ≥ 2.3000.*.252500, < 2.3000.1032164386.258709
Fixed in
  • 2.3000.1032164386.258709

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.

References

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