CVE-2022-44755Network attack vector

Code execution via crafted Ami Pro files

Published Dec 17, 2022 · Updated Apr 17, 2025

Stack-based buffer overflow in HCL Notes 9 and 10 allows remote attackers to execute code or crash the client via a crafted Ami Pro file. The Micro Focus KeyView lasr.dll parser writes attacker-controlled document data beyond a stack buffer while processing the file. Processing the document reaches the vulnerable parser, with code execution or a client crash as the bounded consequence.

CVSS severity9.8
Critical
EPSS probability0.70%
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 HCL Notes 9 and 10 allows remote attackers to execute code or crash the client via a crafted Ami Pro file. The Micro Focus KeyView lasr.dll parser writes attacker-controlled document data beyond a stack buffer while processing the file. Processing the document reaches the vulnerable parser, with code execution or a client crash as the bounded consequence.

The record

CVE
CVE-2022-44755
Published
Dec 17, 2022
Updated
Apr 17, 2025
Vendor
HCL Software
Product
HCL Notes
Classifications
CWE-787, T1203
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

9.8HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/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-787Out-of-bounds Write
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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