CVE-2025-55177

5.4 MEDIUM 14% exploit odds exploited in the wild Fix listed Auth & access Device

What it is

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. Limited direct impact.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2025-08-08 18:21 UTC ReservedThe CVE id was reserved by its CNA
2025-08-29 16:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2025-09-02 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2025-09-23 Remediation deadlineCISA's due date for federal agencies to fix it
2026-10-18 21:10 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 13.5% in the next 30 days (EPSS).
Severity: 5.4 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2025-08-29 16:15 UTC
Last modified: 2026-10-18 21:10 UTC
Added to CISA KEV: 2025-09-02
Exploit probability: 13.5% · EPSS, next 30 days
Weakness: CWE-863 · Incorrect authorization
Record status: Analyzed

Affected

Whatsapp < 2.25.21.73
Whatsapp < 2.25.21.78
Whatsapp Business < 2.25.21.78

Attack profile CVSS 3.1 · 5.4

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2025-55177.md and follow it. Check whether this project is affected by CVE-2025-55177. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record