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TI-2021-06344 Aliases CVE-2021-24027GHSA-rr7p-xgf7-grw4

A cache configuration issue prior to WhatsApp for Android v2.21.4.18 and WhatsApp…

Priority LOW 39CWE-524Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A cache configuration issue prior to WhatsApp for Android v2.21.4.18 and WhatsApp Business for Android v2.21.4.18 may have allowed a third party with access to the device’s external storage to read cached TLS material.

Why it matters now

EPSS 0.03805 90th percentileScored 2026-11-07
Fix Fixed WhatsApp for Android (Facebook): v2.21.4.18

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MetaWhatsApp Business for Androidv2.21.4.18—No fix listedCNA
MetaWhatsApp for Androidbefore v2.21.4.18v2.21.4.18Patch availableCNA
  • WhatsApp Business for Android VendorMeta Affected v2.21.4.18 Fixed in — No fix listed CNA
  • WhatsApp for Android VendorMeta Affected before v2.21.4.18 Fixed in v2.21.4.18 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:*before 2.21.4.18VulnerableWhatsApp
cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:android:*:*before 2.21.4.18VulnerableWhatsApp
  • cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:* Versions before 2.21.4.18 Vulnerable ·WhatsApp
  • cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:android:*:* Versions before 2.21.4.18 Vulnerable ·WhatsApp

Remediation

  • Fix · CNA WhatsApp for Android (Facebook) Fixed in v2.21.4.18

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-24027
  2. 2026-10-03 Alias added: GHSA-rr7p-xgf7-grw4
  3. 2026-10-30 EPSS moved to the 90th–95th percentile

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