CVE-2024-11957Public exploit

Code execution via incomplete library signature verification

Published Mar 4, 2025 · Updated Mar 5, 2025

Improper signature verification in Kingsoft WPS Office 12.1.0.18276 and earlier allows local users to execute code through DLL loading. ksojscore.dll accepts an attacker-controlled mixed-case CefPluginPathU8 argument before the trusted parameter, and jscefservice.dll loads libcef.dll from that path without checking its signature. Low-privileged local access and a malicious libcef.dll at an accessible path are required; the library then runs with the WPS Office process rights.

CVSS severity9.3
Critical
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in Kingsoft WPS Office 12.1.0.18276 and earlier allows local users to execute code through DLL loading. ksojscore.dll accepts an attacker-controlled mixed-case CefPluginPathU8 argument before the trusted parameter, and jscefservice.dll loads libcef.dll from that path without checking its signature. Low-privileged local access and a malicious libcef.dll at an accessible path are required; the library then runs with the WPS Office process rights.

The record

CVE
CVE-2024-11957
Published
Mar 4, 2025
Updated
Mar 5, 2025
Vendor
Kingsoft Office Software
Product
WPS Office
Classifications
CWE-347, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.2.0.16909 <12.1.0.18276

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Kingsoft Office Software · WPS Officeversion=12.2.0.16909 <12.1.0.18276

Published CVSS scores

9.3ESETCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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