CVE-2018-6344

mediumpriority · track · 31EPSS 0.019 · 80 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.95% (80th) EPSS

CVSS 5 · medium

Is it mine?

9 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

A heap corruption in WhatsApp can be caused by a malformed RTP packet being sent after a call is established. The vulnerability can be used to cause denial of service. It affects WhatsApp for Android prior to v2.18.293, WhatsApp for iOS prior to v2.18.93, and WhatsApp for Windows Phone prior to v2.18.172.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-122US

affected products (9)

Products and version ranges known to be affected.

Facebook WhatsApp for Android≤ 2.18.293enisa_euvdEU
Facebook WhatsApp for Androidunspecified → 2.18.293enisa_euvdEU
Facebook WhatsApp for Windows Phone≤ 2.18.172enisa_euvdEU
Facebook WhatsApp for Windows Phoneunspecified → 2.18.172enisa_euvdEU
Facebook WhatsApp for iOS≤ 2.18.93enisa_euvdEU
Facebook WhatsApp for iOSunspecified → 2.18.93enisa_euvdEU
whatsapp whatsapp< 2.18.172nvdUScpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:*:*:*
whatsapp whatsapp< 2.18.293nvdUScpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:*:*:*
whatsapp whatsapp< 2.18.93nvdUScpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2018-12-31modified 2026-06-17

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+16119 more

references (8)

External citations — patches, advisories, analysis.

scry

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