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Critical

Arbitrary DLL Load in Kingsoft WPS Office promecefpluginhost.exe

IdentifiersCVE-2024-7263CWE-22· Improper Limitation of a Pathname…

CVE-2024-7263 is an improper path validation vulnerability in promecefpluginhost.exe in Kingsoft WPS Office for Windows. Affected versions are 12.2.0.13110 through 12.2.0.17115, exclusive. According to the provided content, the issue allows an attacker to cause WPS Office to load an arbitrary Windows library because a parameter was not properly sanitized. The content further states that the patch released in version 12.1.0.17119 for CVE-2024-7262 was insufficiently restrictive, and that another parameter remained improperly validated, enabling arbitrary Windows library execution. The associated detection content characterizes exploitation as a DLL hijack involving the ksoqing custom protocol handler and remote library loading by promecefpluginhost.exe.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker to force WPS Office to load and execute an arbitrary Windows DLL in the context of the targeted application. This can result in arbitrary code execution, malware deployment, persistence establishment, and follow-on compromise of the affected user context. In practical intrusion scenarios, the vulnerability can be used as an initial execution vector for payload delivery, including backdoors and downloaders.

Mitigation

If you can’t patch tonight, do this now.

Until patching is completed, reduce exposure by restricting or monitoring invocation of the ksoqing custom protocol handler, blocking untrusted remote library paths and suspicious DLL loads by promecefpluginhost.exe, and applying application control to prevent unsigned or untrusted DLL execution. Additional mitigations include limiting user interaction with untrusted documents or links that may trigger the vulnerable code path and monitoring for WPS Office processes loading libraries from unusual local or remote locations.

Remediation

Patch, then assume compromise.

Upgrade Kingsoft WPS Office for Windows to a version not affected by CVE-2024-7263. The provided content identifies affected versions as 12.2.0.13110 through 12.2.0.17115, exclusive, and notes that the earlier fix for CVE-2024-7262 was incomplete. Organizations should ensure they deploy the vendor update that specifically addresses CVE-2024-7263 rather than relying solely on the prior mitigation for CVE-2024-7262.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
KingsoftWps Officeapplication

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What this page doesn’t show

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Exposure mapping

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Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware1

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

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Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

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