Is CVE-2018-6350 in the CISA KEV catalog?

No. CVE-2018-6350 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-6350?

CVE-2018-6350 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2018-6350?

CVE-2018-6350 has an EPSS score of 1.69% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-6350?

Upgrade whatsapp to 2.18.100.6 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-6350

CRITICALEPSS 74th pctl

9.8

CVSS v3

NVD

Description

An out-of-bounds read was possible in WhatsApp due to incorrect parsing of RTP extension headers. This issue affects WhatsApp for Android prior to 2.18.276, WhatsApp Business for Android prior to 2.18.99, WhatsApp for iOS prior to 2.18.100.6, WhatsApp Business for iOS prior to 2.18.100.2, and WhatsApp for Windows Phone prior to 2.18.224.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

whatsappNVD

Affected:< 2.18.100.6Fixed in:2.18.100.6CVE-2018-6350derived from NVD

Affected:< 2.18.224Fixed in:2.18.224CVE-2018-6350derived from NVD

Affected:< 2.18.99Fixed in:2.18.99CVE-2018-6350derived from NVD

whatsapp businessNVD

Affected:< 2.18.100.2Fixed in:2.18.100.2CVE-2018-6350derived from NVD

Affected:< 2.18.276Fixed in:2.18.276CVE-2018-6350derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.69%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Third-Party Advisory1

facebook.com

Other references1

securityfocus.com

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-09-03.