CVE-2023-36887Public exploit

Code execution via PDF addIcon type confusion

Published Jul 14, 2023 · Updated Feb 28, 2025

Type confusion in Microsoft Edge before 114.0.1823.82 allows context-dependent attackers to execute code through a crafted PDF file. The Acrobat-based PDF engine's addIcon implementation inadequately validates the object type supplied by PDF JavaScript, causing invalid pointer use and arbitrary memory writes. A victim must open the malicious document in Edge; the demonstrated outcome is a browser crash, while controlled memory corruption enables code execution.

CVSS severity7.8
High
EPSS probability1.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in Microsoft Edge before 114.0.1823.82 allows context-dependent attackers to execute code through a crafted PDF file. The Acrobat-based PDF engine's addIcon implementation inadequately validates the object type supplied by PDF JavaScript, causing invalid pointer use and arbitrary memory writes. A victim must open the malicious document in Edge; the demonstrated outcome is a browser crash, while controlled memory corruption enables code execution.

The record

CVE
CVE-2023-36887
Published
Jul 14, 2023
Updated
Feb 28, 2025
Vendor
Microsoft
Product
Microsoft Edge (Chromium-based)
Classifications
CWE-843, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 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=1.0.0 <114.0.1823.82

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Edge (Chromium-based)version=1.0.0 <114.0.1823.82

Published CVSS scores

8.1Cisco TalosCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8Microsoft CorporationCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
T1204.002Malicious 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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