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CVE-2021-40399

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-05-12 · updated 2026-06-17
• Weakness: CWE-416

Description

An exploitable use-after-free vulnerability exists in WPS Spreadsheets ( ET ) as part of WPS Office, version 11.2.0.10351. A specially-crafted XLS file can cause a use-after-free condition, resulting in remote code execution. An attacker needs to provide a malformed file to the victim to trigger the vulnerability.

Affected products

• WPS Office: 11.2.0.10351

References

• https://security.wps.cn/notices/28
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1412
• https://security.wps.cn/notices/28
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1412

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