Out-of-bounds write in Meta WhatsApp Android
Priority MEDIUM 45CWE-787Published · 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-787 and the CVSS impact.
Summary
A user controlled parameter used in video call in WhatsApp for Android prior to v2.20.17, WhatsApp Business for Android prior to v2.20.7, WhatsApp for iPhone prior to v2.20.20, and WhatsApp Business for iPhone prior to v2.20.20 could have allowed an out-of-bounds write on 32-bit devices.
Why it matters now
EPSS 0.01488 74th percentileScored 2026-11-07
Fix Fixed WhatsApp Android (Facebook): 2.20.17WhatsApp Business for Android (Facebook): 2.20.7+2 more products
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Meta | WhatsApp Android | 2.20.17; before 2.20.17 | 2.20.17 | Patch available | CNA |
| Meta | WhatsApp Business for Android | 2.20.7; before 2.20.7 | 2.20.7 | Patch available | CNA |
| Meta | WhatsApp iPhone | 2.20.20; before 2.20.20 | 2.20.20 | Patch available | CNA |
| Meta | WhatsApp Business for iPhone | 2.20.20; before 2.20.20 | 2.20.20 | Patch available | CNA |
- WhatsApp Android VendorMeta Affected 2.20.17; before 2.20.17 Fixed in 2.20.17 Patch available CNA
- WhatsApp Business for Android VendorMeta Affected 2.20.7; before 2.20.7 Fixed in 2.20.7 Patch available CNA
- WhatsApp iPhone VendorMeta Affected 2.20.20; before 2.20.20 Fixed in 2.20.20 Patch available CNA
- WhatsApp Business for iPhone VendorMeta Affected 2.20.20; before 2.20.20 Fixed in 2.20.20 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:* | before 2.20.17 | Vulnerable | |
| cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:* | before 2.20.20 | Vulnerable | |
| cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:android:*:* | before 2.20.7 | Vulnerable | |
| cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:iphone_os:*:* | before 2.20.20 | Vulnerable |
- cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:* Versions before 2.20.17 Vulnerable ·WhatsApp
- cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:* Versions before 2.20.20 Vulnerable ·WhatsApp
- cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:android:*:* Versions before 2.20.7 Vulnerable ·WhatsApp
- cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:iphone_os:*:* Versions before 2.20.20 Vulnerable ·WhatsApp
Remediation
- Fix · CNA WhatsApp Android (Facebook) Fixed in 2.20.17
- Fix · CNA WhatsApp Business for Android (Facebook) Fixed in 2.20.7
- Fix · CNA WhatsApp iPhone (Facebook) Fixed in 2.20.20
- Fix · CNA WhatsApp Business for iPhone (Facebook) Fixed in 2.20.20
Timeline
- 2026-10-02 Threatist record created from CVE-2020-1891
- 2026-10-03 Alias added: GHSA-fmf2-2478-rv56
References
More Meta vulnerabilities
- 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
Sources
- CVE-2020-1891 · CVE Program
- CVE-2020-1891 · NVD
- FIRST EPSS
- GHSA-fmf2-2478-rv56 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences