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CVE-2019-3568· NVD / CVE Program· CNA facebook

A buffer overflow vulnerability in WhatsApp VOIP stack allowed remote code execution via specially crafted series of RTCP packets sent to a

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.

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded
Published
May 14, 2019
Updated
Jun 16, 2026
EPSS
30.1% · 98th percentile
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Action score

78

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
9 / 30 · 30.1%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Apr 19, 2022. That signals real attacks, not theory.

Remediation deadline for government agencies: May 10, 2022.

Noroxi analysis

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Affected systems

VendorProduct
whatsappwhatsapp
whatsappwhatsapp business

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • whatsapp whatsappbefore 2.18.15
  • whatsapp whatsappbefore 2.18.348
  • whatsapp whatsappbefore 2.19.51
  • whatsapp whatsappbefore 2.19.134
  • whatsapp whatsapp businessbefore 2.19.44
  • whatsapp whatsapp businessbefore 2.19.51

Versions reported by the vendor

Affected version ranges reported by the assigning authority (facebook). Independent of NVD's CPE analysis and usually ahead of it.

  • Facebook WhatsApp Business for Android

    • 2.19.44affected
    • unspecified and later · before 2.19.134affected

  • Facebook WhatsApp Business for iOS

    • 2.19.51affected
    • unspecified and later · before 2.19.51affected

  • Facebook WhatsApp for Android

    • 2.19.134affected
    • unspecified and later · before 2.19.134affected

  • Facebook WhatsApp for iOS

    • 2.19.51affected
    • unspecified and later · before 2.19.51affected

  • Facebook WhatsApp for Tizen

    • 2.18.15affected
    • unspecified and later · before 2.18.15affected

  • Facebook WhatsApp for Windows Phone

    • 2.18.348affected
    • unspecified and later · before 2.18.348affected

Same product

whatsapp: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-18426A vulnerability in WhatsApp Desktop versions prior to 0.3.9309 when paired with WhatsApp for iPhone versions prior to 2.20.10 allows cross-sKEV
    82Now
  • CVE-2025-55177Incomplete authorization of linked device synchronization messages in WhatsApp for iOS prior to v2.25.21.73, WhatsApp Business for iOS v2.25KEV
    52Plan
  • CVE-2019-11932A double free vulnerability in the DDGifSlurp function in decoding.c in the android-gif-drawable library before version 1.2.18, as used in W
    48Plan
  • CVE-2022-36934An integer overflow in WhatsApp could result in remote code execution in an established video call.
    40Plan
  • CVE-2020-1909A use-after-free in a logging library in WhatsApp for iOS prior to v2.20.111 and WhatsApp Business for iOS prior to v2.20.111 could have res
    40Plan
  • CVE-2020-1907A stack overflow in WhatsApp for Android prior to v2.20.196.16, WhatsApp Business for Android prior to v2.20.196.12, WhatsApp for iOS prior
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. CISA KEV+1070 d
  3. TodaySep 30, 2026+2696 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records