CVE-2025-55177

MEDIUM CISA KEV EPSS 89.5%
Published Aug 29, 202510mo ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Aug 29, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago
KEV Listed Sep 2, 2025 10mo ago
KEV Due Sep 23, 2025 284d overdue

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 Details

Base Score
5.4
Exploitability
2.8
Impact
2.5
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

CISA Known Exploited Overdue 284d
Added
Sep 2, 2025
Due
Sep 23, 2025

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

EPSS Exploit Probability
89.5% percentile
Exploit & Patch Status
Actively Exploited (KEV)
No Patch Available

Weaknesses 1

CWE-863 Incorrect Authorization Authorization

Affected Products 3

VendorProductVersionRange
whatsappwhatsapp*≥2.22.25.2  –  <2.25.21.73
whatsappwhatsapp*≥2.22.25.2  –  <2.25.21.78
whatsappwhatsapp_business*≥2.22.25.2  –  <2.25.21.78

References 3

  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177
    US Government Resource
  • facebook.com https://www.facebook.com/security/advisories/cve-2025-55177
    Vendor Advisory
  • whatsapp.com https://www.whatsapp.com/security/advisories/2025/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.