Is CVE-2021-24035 in the CISA KEV catalog?

No. CVE-2021-24035 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-24035?

CVE-2021-24035 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2021-24035?

CVE-2021-24035 has an EPSS score of 1.13% (63th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-24035?

Upgrade whatsapp to 2.21.8.13 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-24035

CRITICAL

9.1

CVSS v3

NVD

Description

A lack of filename validation when unzipping archives prior to WhatsApp for Android v2.21.8.13 and WhatsApp Business for Android v2.21.8.13 could have allowed path traversal attacks that overwrite WhatsApp files.

CWE-23 CWE-22Path Traversal

How to fix

Remediation Available

whatsappNVD

Affected:< 2.21.8.13Fixed in:2.21.8.13CVE-2021-24035derived from NVD

whatsapp businessNVD

Affected:< 2.21.8.13Fixed in:2.21.8.13CVE-2021-24035derived 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

ConfidentialityNone

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.13%probability of exploitation in 30 days

63rdpercentile

Moderate risk: more likely to be exploited than 63% of all known CVEs.

References

Vendor Advisory1

whatsapp.com

Related Vulnerabilities

Other CWE-23 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-27199	High	7.3	100%	KEV + Ransom	Fix
CVE-2020-5410	High	7.5	96%	KEV	Fix
CVE-2021-40870	Critical	9.8	92%	KEV	Fix
CVE-2025-64446	Critical	9.8	89%	KEV	Fix
CVE-2020-5405	Medium	6.5	69%	-	Fix
CVE-2025-55752	High	7.5	67%	-	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.