CVE-2022-44753Network attack vector

Code execution via WordPerfect parser stack overflow

Published Dec 17, 2022 · Updated Apr 17, 2025

Stack-based buffer overflow in Micro Focus KeyView within HCL Notes 9 and 10 allows remote attackers to execute code via a crafted WordPerfect file. The wp6sr.dll parser writes beyond a stack buffer while processing untrusted WordPerfect content. Delivery and processing of the crafted file are required; successful exploitation can crash the client or run code in its process context.

CVSS severity9.8
Critical
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Micro Focus KeyView within HCL Notes 9 and 10 allows remote attackers to execute code via a crafted WordPerfect file. The wp6sr.dll parser writes beyond a stack buffer while processing untrusted WordPerfect content. Delivery and processing of the crafted file are required; successful exploitation can crash the client or run code in its process context.

The record

CVE
CVE-2022-44753
Published
Dec 17, 2022
Updated
Apr 17, 2025
Vendor
HCL Software
Product
HCL Notes
Classifications
CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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=9, 10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCL Software · HCL Notesversion=9, 10

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.8HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File

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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