CVE-2025-55177

Exp

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.

Published: 2025-08-29 Last update: 2025-10-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-55177 is rated Active Exploitation (72.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.76%). CISA KEV confirms active exploitation (added 2025-09-02) affecting Meta Platforms / WhatsApp. a weakness (CWE-863) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2025-55177

Name: Meta Platforms WhatsApp Incorrect Authorization Vulnerability · CISA KEV detail

Exploit added: 2025-09-02

Action due: 2025-09-23

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.

Exploit prediction scoring system (EPSS) score for CVE-2025-55177

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-22 0.73% 0.76% +0.04%
2 2026-04-24 0.81% 0.73% -0.09%
3 2026-04-02 — 0.81% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-55177

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 2.5 [email protected]

Weakness enumeration for CVE-2025-55177

Affected software / configurations for CVE-2025-55177

Vendor Product Version Raw CPE
whatsapp whatsapp >= 2.22.25.2, < 2.25.21.73 cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*
whatsapp whatsapp >= 2.22.25.2, < 2.25.21.78 cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:macos:*:*
whatsapp whatsapp_business >= 2.22.25.2, < 2.25.21.78 cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:iphone_os:*:*

References for CVE-2025-55177

cvelogic Threat Intelligence