What is CVE-2020-25291?

CVE-2020-25291 is a high-severity vulnerability in Kingsoft Wps Office, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-09-13.

How severe is CVE-2020-25291?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-25291 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Kingsoft Wps Office

CVE-2020-25291

GdiDrawHoriLineIAlt in Kingsoft WPS Office before 11.2.0.9403 allows remote heap corruption via a crafted PLTE chunk in PNG data within a Word document. This is related to QBrush::setMatrix in gui/painting/qbrush.cpp in Qt 4.x.

Vulnerability class: Buffer Overflow

Published 2020-09-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.1th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Kingsoft Wps Office

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

zeifan.my/security/rce/heap/2020/09/03/wps-rce-heap.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-25291?: CVE-2020-25291 is a high-severity vulnerability in Kingsoft Wps Office, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2020-09-13.
How severe is CVE-2020-25291?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-25291 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.