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TI-2018-14669 Aliases CVE-2018-20655GHSA-99ph-jqg7-g9v9

Stack-based buffer overflow in Meta WhatsApp for iOS

Priority MEDIUM 46CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

When receiving calls using WhatsApp for iOS, a missing size check when parsing a sender-provided packet allowed for a stack-based overflow. This issue affects WhatsApp for iOS prior to v2.18.90.24 and WhatsApp Business for iOS prior to v2.18.90.24.

Why it matters now

EPSS 0.02196 82nd percentileScored 2026-11-07
Fix Fixed WhatsApp for iOS (Facebook): 2.18.90.24WhatsApp Business for iOS (Facebook): 2.18.90.24

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MetaWhatsApp for iOS2.18.90.24; before 2.18.90.242.18.90.24Patch availableCNA
MetaWhatsApp Business for iOS2.18.90.24; before 2.18.90.242.18.90.24Patch availableCNA
  • WhatsApp for iOS VendorMeta Affected 2.18.90.24; before 2.18.90.24 Fixed in 2.18.90.24 Patch available CNA
  • WhatsApp Business for iOS VendorMeta Affected 2.18.90.24; before 2.18.90.24 Fixed in 2.18.90.24 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*before 2.18.90.24VulnerableWhatsApp
cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:iphone_os:*:*before 2.18.90.24VulnerableWhatsApp
  • cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:* Versions before 2.18.90.24 Vulnerable ·WhatsApp
  • cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:iphone_os:*:* Versions before 2.18.90.24 Vulnerable ·WhatsApp

Remediation

  • Fix · CNA WhatsApp for iOS (Facebook) Fixed in 2.18.90.24
  • Fix · CNA WhatsApp Business for iOS (Facebook) Fixed in 2.18.90.24

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-20655
  2. 2026-10-03 Alias added: GHSA-99ph-jqg7-g9v9

References

Advisory 1

  • TI-2025-34861 Deserialization of untrusted data in Meta react-server-dom-webpack KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-02633 Heap-based buffer overflow in Meta WhatsApp for Android KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-13416 Cross-site scripting in Meta WhatsApp Desktop KEVCVSS 3.1HIGH 8.2
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2025-34857 Incorrect authorization in Meta WhatsApp Desktop for Mac KEVCVSS 3.1MEDIUM 5.4
  • TI-2025-34863 Deserialization of untrusted data in Meta react-server-dom-webpack CVSS 3.1HIGH 7.5
See all 191 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences