Is CVE-2020-1891 in the CISA KEV catalog?

No. CVE-2020-1891 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-1891?

CVE-2020-1891 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2020-1891?

CVE-2020-1891 has an EPSS score of 1.49% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-1891?

Upgrade whatsapp to 2.20.17 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-1891

CRITICALEPSS 71th pctl

9.8

CVSS v3

NVD

Description

A user controlled parameter used in video call in WhatsApp for Android prior to v2.20.17, WhatsApp Business for Android prior to v2.20.7, WhatsApp for iPhone prior to v2.20.20, and WhatsApp Business for iPhone prior to v2.20.20 could have allowed an out-of-bounds write on 32-bit devices.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

whatsappNVD

Affected:< 2.20.17Fixed in:2.20.17CVE-2020-1891derived from NVD

Affected:< 2.20.20Fixed in:2.20.20CVE-2020-1891derived from NVD

whatsapp businessNVD

Affected:< 2.20.20Fixed in:2.20.20CVE-2020-1891derived from NVD

Affected:< 2.20.7Fixed in:2.20.7CVE-2020-1891derived 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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.49%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Vendor Advisory1

whatsapp.com

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	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 2024-11-21.