What’s Vulnerable › Vulnerabilities

CVE-2018-6390

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-01-29 · updated 2026-06-17
• Weakness: CWE-119

Description

The WStr::assign function in kso.dll in Kingsoft WPS Office 10.1.0.7106 and 10.2.0.5978 does not validate the size of the source memory block before an _copy call, which allows remote attackers to cause a denial of service (access violation and application crash) via a crafted (a) web page, (b) office document, or (c) .rtf file.

Affected products

• WPS Office: 10.1.0.7106, 10.2.0.5978

References

• https://github.com/Khwarezmia/WPS_POC/tree/master/wps_20180129
• https://github.com/Khwarezmia/WPS_POC/tree/master/wps_20180129

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