CVE-2025-55177: Facebook WhatsApp Desktop for Mac · Incorrect Authorization
Affects Facebook WhatsApp Desktop for MacSource CVE Database V5
Mentioned vulnerabilities
Exploited in the wild · KEV due 23 Sep 2025 · 13% EPSS : upgrade to 2.25.21.78 now.
Data as of 25 Oct 2026, 19:02 UTC
- KEV deadline
- US federal agencies must patch by this date; a sensible deadline for everyone else.
- EPSS
- 13.0% chance of exploitation in 30 days – higher than 96% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.25.21.78, 2.25.21.73
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:CExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 29 Aug 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 4 days after disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by facebook
, 21 days before disclosure
CVE published
on cve.org
, t = 0
In Threat Radar
record ingested
, 12 minutes after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed
, 4 days after disclosure
KEV remediation due
US federal deadline
, 25 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Upgrade WhatsApp to 2.25.21.78 (Desktop for Mac, Business for iOS) or 2.25.21.73 (iOS).
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| FacebookWhatsApp Desktop for Mac | Affected
| Fixed in
|
| FacebookWhatsApp Business for iOS | Affected
| Fixed in
|
| FacebookWhatsApp for iOS | Affected
| Fixed in
|
Description
Incomplete authorization of linked device synchronization messages in WhatsApp for iOS prior to v2.25.21.73, WhatsApp Business for iOS v2.25.21.78, and WhatsApp for Mac v2.25.21.78 could have allowed an unrelated user to trigger processing of content from an arbitrary URL on a target’s device. We assess that this vulnerability, in combination with an OS-level vulnerability on Apple platforms (CVE-2025-43300), may have been exploited in a sophisticated attack against specific targeted users.