CVE-2019-3568

Exp

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. The issue affects WhatsApp for Android prior to v2.19.134, WhatsApp Business for Android prior to v2.19.44, WhatsApp for iOS prior to v2.19.51, WhatsApp Business for iOS prior to v2.19.51, WhatsApp for Windows Phone prior to v2.18.348, and WhatsApp for Tizen prior to v2.18.15.

Published: 2019-05-14 Last update: 2025-10-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-3568 is rated Critical Active Threat (93.6/100): CVSS Critical severity, with high exploitation likelihood (EPSS 39.17%, 98th percentile). CISA KEV confirms active exploitation (added 2022-04-19) affecting Meta Platforms / WhatsApp. a weakness (CWE-122) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2019-3568

Name: WhatsApp VOIP Stack Buffer Overflow Vulnerability · CISA KEV detail

Exploit added: 2022-04-19

Action due: 2022-05-10

Required action: Apply updates per vendor instructions.

Exploit prediction scoring system (EPSS) score for CVE-2019-3568

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 47.37% 39.17% -8.20%
2 2026-06-06 47.96% 47.37% -0.59%
3 2026-05-22 — 47.96% —

Full EPSS history (72 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-3568

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2019-3568

Affected software / configurations for CVE-2019-3568

Vendor Product Version Raw CPE
whatsapp whatsapp < 2.18.15 cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:tizen:*:*
whatsapp whatsapp < 2.18.348 cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:windows_phone:*:*
whatsapp whatsapp < 2.19.51 cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:iphone_os:*:*
whatsapp whatsapp < 2.19.134 cpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:android:*:*
whatsapp whatsapp_business < 2.19.44 cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:android:*:*
whatsapp whatsapp_business < 2.19.51 cpe:2.3:a:whatsapp:whatsapp_business:*:*:*:*:*:iphone_os:*:*

References for CVE-2019-3568

cvelogic Threat Intelligence