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CVE-2025-55177

5.4, medium Known exploited

Meta Platforms WhatsApp Incorrect Authorization Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
5.4, medium medium CVSS v3.1
EPSS, next 30 days
5% higher than 91.7% of scored CVEs
Exploitation
Confirmed in the wild
Published
29 Aug 2025a year ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 2 Sept 2025. US federal agencies had to remediate by 23 Sept 2025, a deadline that has passed.

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.

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.

Details

Vendor
Meta Platforms
Product
WhatsApp Desktop for Mac
Weakness
CWE-863 (opens in a new tab)
Status
Analyzed
Updated
8 Oct 2026
Assigner
cve-assign@fb.com

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

References 3

Advisories 2

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Meta Platforms CVEs

Every Meta Platforms CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2019-18426 WhatsApp Cross-Site Scripting Vulnerability KEV EPSS 68% 8.2, high
  • CVE-2019-3568 WhatsApp VOIP Stack Buffer Overflow Vulnerability KEV EPSS 30% 9.8, critical

Beyond this page

Is CVE-2025-55177 in your network?

This page tells you how dangerous CVE-2025-55177 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2025-55177 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2025-55177 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.