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CISA KEV · Known exploitedHigh

CVE-2019-18426

Meta Platforms WhatsApp

A vulnerability in WhatsApp Desktop versions prior to 0.3.9309 when paired with WhatsApp for iPhone versions prior to 2.20.10 allows cross-site scripting and local file reading. Exploiting the vulnerability requires the victim to click a link preview from a specially crafted text message.

CVSS
8.2
EPSS
67.9%
99.3% percentile
CISA KEV
Listed
Published
2020.01.22
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability67.9%
Technical severityCVSS 8.2

Vulnerability overview

A vulnerability in WhatsApp Desktop versions prior to 0.3.9309 when paired with WhatsApp for iPhone versions prior to 2.20.10 allows cross-site scripting and local file reading. Exploiting the vulnerability requires the victim to click a link preview from a specially crafted text message.

Affected product and versions

Product
Meta Platforms WhatsApp
Affected versions
0.3.9309, unspecified, < 0.3.9309, < 2.20.10
Fixed versions
0.3.9309, 2.20.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.06.13
  1. 1
    Identify

    Confirm that Meta Platforms WhatsApp and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
CWE
CWE-79
KEV added
2022.05.23
Ransomware use
미확인
CVE-2019-18426 — Meta Platforms WhatsApp | SECUFOCUS NOW