A missing bound check in RTCP flag parsing code prior to WhatsApp for Android v2.21.23.2…
Priority MEDIUM 41CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A missing bound check in RTCP flag parsing code prior to WhatsApp for Android v2.21.23.2, WhatsApp Business for Android v2.21.23.2, WhatsApp for iOS v2.21.230.6, WhatsApp Business for iOS 2.21.230.7, and WhatsApp Desktop v2.2145.0 could have allowed an out-of-bounds heap read if a user sent a malformed RTCP packet during an established call.
Why it matters now
EPSS 0.01088 65th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:whatsapp:whatsapp:2.21.23.2:*:*:*:*:android:*:* | 2.21.23.2 | Vulnerable | |
| cpe:2.3:a:whatsapp:whatsapp:2.21.230.6:*:*:*:*:iphone_os:*:* | 2.21.230.6 | Vulnerable | |
| cpe:2.3:a:whatsapp:whatsapp:2.2145.0:*:*:*:desktop:*:*:* | 2.2145.0 | Vulnerable | |
| cpe:2.3:a:whatsapp:whatsapp_business:2.21.23.2:*:*:*:*:android:*:* | 2.21.23.2 | Vulnerable | |
| cpe:2.3:a:whatsapp:whatsapp_business:2.21.230.7:*:*:*:*:iphone_os:*:* | 2.21.230.7 | Vulnerable |
- cpe:2.3:a:whatsapp:whatsapp:2.21.23.2:*:*:*:*:android:*:* Versions 2.21.23.2 Vulnerable ·WhatsApp
- cpe:2.3:a:whatsapp:whatsapp:2.21.230.6:*:*:*:*:iphone_os:*:* Versions 2.21.230.6 Vulnerable ·WhatsApp
- cpe:2.3:a:whatsapp:whatsapp:2.2145.0:*:*:*:desktop:*:*:* Versions 2.2145.0 Vulnerable ·WhatsApp
- cpe:2.3:a:whatsapp:whatsapp_business:2.21.23.2:*:*:*:*:android:*:* Versions 2.21.23.2 Vulnerable ·WhatsApp
- cpe:2.3:a:whatsapp:whatsapp_business:2.21.230.7:*:*:*:*:iphone_os:*:* Versions 2.21.230.7 Vulnerable ·WhatsApp
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-24043
- 2026-10-03 Alias added: GHSA-rxmh-549p-v6m7
References
More Whatsapp vulnerabilities
- 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-2025-34857 Incorrect authorization in Meta WhatsApp Desktop for Mac KEVCVSS 3.1MEDIUM 5.4
- TI-2019-08937 Double free in koral-- android-gif-drawable CVSS 3.1HIGH 8.8
- TI-2025-21703 A spoofing issue in WhatsApp for Windows prior to version 2.2450.6 displayed attachments… CVSS 3.1MEDIUM 6.7
- TI-2022-17146 An integer overflow in WhatsApp could result in remote code execution in an established video call. CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-24043 · CVE Program
- CVE-2021-24043 · NVD
- FIRST EPSS
- GHSA-rxmh-549p-v6m7 · 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