CVE-2023-31275Network attack vector

Code execution via uninitialized Data pointer

Published Nov 27, 2023 · Updated Feb 25, 2026

Use of an uninitialized pointer in WPS Office 11.2.0.11537 allows remote attackers to execute code via a malformed Excel file. The ET parser assumes a required Data element exists inside Caption, then reads and writes through its uninitialized object pointer when Data is absent. Execution requires a user to open the crafted file; heap grooming can turn the resulting memory corruption into code execution.

CVSS severity8.8
High
EPSS probability1.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of an uninitialized pointer in WPS Office 11.2.0.11537 allows remote attackers to execute code via a malformed Excel file. The ET parser assumes a required Data element exists inside Caption, then reads and writes through its uninitialized object pointer when Data is absent. Execution requires a user to open the crafted file; heap grooming can turn the resulting memory corruption into code execution.

The record

CVE
CVE-2023-31275
Published
Nov 27, 2023
Updated
Feb 25, 2026
Vendor
Kingsoft Office Software
Product
WPS Office
Classifications
CWE-457, T1204.002, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 2026Record 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=11.2.0.11537

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kingsoft Office Software · WPS Officeversion=11.2.0.11537

Published CVSS scores

8.8Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-457Use of Uninitialized Variable
T1204.002User Execution: Malicious File
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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