Is CVE-2026-23863 in the CISA KEV catalog?

No. CVE-2026-23863 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-23863?

CVE-2026-23863 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-23863?

CVE-2026-23863 has an EPSS score of 0.53% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-23863?

Upgrade whatsapp to 2.3000.1032164386.258709 or later.

CVE & CISA-KEV Catalog

CVE-2026-23863

MEDIUM

6.5

CVSS v3

NVD

Description

An attachment spoofing issue in WhatsApp for Windows prior to v2.3000.1032164386.258709 could have allowed maliciously formatted documents with embedded NUL bytes in the filename to be shown in the application as one type of file but run as an executable when opened. We have not seen evidence of exploitation in the wild.

CWE-158

How to fix

Remediation Available

whatsappNVD

Affected:< 2.3000.1032164386.258709Fixed in:2.3000.1032164386.258709CVE-2026-23863derived 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 InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.53%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Vendor Advisory1

whatsapp.com

Third-Party Advisory1

facebook.com

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Markdown

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HTML

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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 2026-05-11.