Meta Platforms flaws being used in attacks

CISA lists 3 flaws in Meta Platforms products as being used in attacks, most recently on 2 Sep 2025.

What to do

1. Update every Meta Platforms product you use.Install the updates Meta Platforms offers, on every device, and restart when asked. Each flaw below has a fix or clear advice; that’s one of CISA’s conditions for listing it.
2. If someone looks after IT for you, send them this page.Many of these are in equipment you don’t see: routers, firewalls, servers, the office network. Ask them to confirm each one is fixed, or that you don’t use the product.
3. Check anything else in the lookup.Search any app, company or CVE. Not being on CISA’s list doesn’t mean safe: keep updating either way.

Every flaw, newest first

1. Being used in attacksAdded by CISA on 2 Sep 2025
   Meta Platforms WhatsApp
   CVE-2025-55177Meta Platforms WhatsApp Incorrect Authorization Vulnerability
   Meta Platforms WhatsApp contains an incorrect authorization vulnerability due to an incomplete authorization of linked device synchronization messages. This vulnerability could allow an unrelated user to trigger processing of content from an arbitrary URL on a target’s device.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
2. Being used in attacksAdded by CISA on 23 May 2022
   Meta Platforms WhatsApp
   CVE-2019-18426WhatsApp Cross-Site Scripting Vulnerability
   A vulnerability in WhatsApp Desktop when paired with WhatsApp for iPhone allows cross-site scripting and local file reading.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
3. Being used in attacksAdded by CISA on 19 Apr 2022
   Meta Platforms WhatsApp
   CVE-2019-3568WhatsApp VOIP Stack Buffer Overflow Vulnerability
   A buffer overflow vulnerability in WhatsApp VOIP stack allowed remote code execution via specially crafted series of RTCP packets sent to a target phone number.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD

From CISA’s Known Exploited Vulnerabilities catalog, updated 21 Oct 2026 (version 2026.10.21). CISA’s required actions are written for US government agencies. Meta Platforms on CISA’s site.