CVE-2023-33140Public exploitNetwork attack vector

Data exposure via disguised notebook links

Published Jun 13, 2023 · Updated Mar 19, 2025

Spoofing in Microsoft OneNote before 16.0.14326.21450 allows remote attackers to disguise malicious links in crafted notebooks. The crafted notebook makes attacker-controlled link or embedded-file content appear trustworthy, concealing its actual destination or payload. Exploitation requires a user to open the file and select the crafted content, exposing data through the resulting navigation or launch.

CVSS severity6.5
Medium
EPSS probability1.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Spoofing in Microsoft OneNote before 16.0.14326.21450 allows remote attackers to disguise malicious links in crafted notebooks. The crafted notebook makes attacker-controlled link or embedded-file content appear trustworthy, concealing its actual destination or payload. Exploitation requires a user to open the file and select the crafted content, exposing data through the resulting navigation or launch.

The record

CVE
CVE-2023-33140
Published
Jun 13, 2023
Updated
Mar 19, 2025
Vendor
Microsoft
Product
Microsoft OneNote
Classifications
CWE-290, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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=16.0.0 <16.0.14326.21450

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft OneNoteversion=16.0.0 <16.0.14326.21450

Published CVSS scores

6.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

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 exploitPublished

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing
T1204.002User Execution: Malicious File

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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