CVE-2025-55177

CVE Enrichment

CVSS: 5.4 MEDIUM
EPSS: 4.73%
EPSS Percentile: 91.64%
CISA KEV: YES — Known Exploited Vulnerability

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: cve-assign@fb.com
Published: 29-Aug-2025 23:15
Last Modified: 08-Oct-2026 17:35
EPSS Date: 2026-10-10
CWE: CWE-863

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:L /
                            UI:N /
                            S:U /
                            C:L /
                            I:L /
                            A:N

CISA KEV Details

Date Added: 2025-09-02
Remediation Due: 2025-09-23
Known Ransomware Campaign Use: Unknown
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.
Notes: https://www.whatsapp.com/security/advisories/2025/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-55177

Affected Products / Versions

whatsapp / whatsapp
Version / affected range: * · from (inclusive) 2.22.25.2 · before (exclusive) 2.25.21.73
cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*
whatsapp / whatsapp
Version / affected range: * · from (inclusive) 2.22.25.2 · before (exclusive) 2.25.21.78
cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:macos:*:*
whatsapp / whatsapp_business
Version / affected range: * · from (inclusive) 2.22.25.2 · before (exclusive) 2.25.21.78
cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:iphone_os:*:*

References

Last enrichment sync: 11-Oct-2026 12:03
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

look for routes through components that process untrusted content." As an example, he pointed to CVE-2025-55177, a vulnerability in WhatsApp that attackers exploited in combination with CVE-2025-43300, another Apple Patches Actively Exploited Zero-Day in Targeted Attacks

CVE (2)

Malware (1)

People (2)

Vendors (2)

Products (7)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.