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CVE-2025-55177

Published: Aug 29, 2025Updated: Oct 24, 2025 Sources: CVE List NVD BDUCWE-863
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
4.1%
Top 10.5%
CISA KEV
Active Exploitation
Since Sep 2, 2025
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-863

Affected Products

WhatsApp Desktop for MacFacebookCommunications
WhatsApp Business for iOSFacebookCommunications
WhatsApp for iOSFacebookCommunications
whatsappwhatsapp
Mobile App
Communications / messaging-chat
whatsapp businesswhatsapp
SaaSMobile App
Communications / messaging-chat
facebookcommercialUSCommunicationsaka meta, facebook inc.
whatsappcommercialCommunicationsaka whatsapp business, whatsapp desktop
and 3 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Sep 2, 2025
Remediation due:Sep 23, 2025

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://www.facebook.com/security/advisories/cve-2025-55177
facebook.com
https://www.whatsapp.com/security/advisories/2025/
whatsapp.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177
cisa.gov
and 2 more references View all →

Timeline

Published
Aug 29, 2025
Added to CISA KEV
Sep 2, 2025
Last Updated
Oct 24, 2025

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