CVE-2023-36034

Code execution via undisclosed use-after-free

Published Nov 3, 2023 · Updated Oct 8, 2025

Use-after-free in Chromium-based Microsoft Edge before 119.0.2151.44 allows attackers to execute code after user interaction. Microsoft has not disclosed the affected Edge component, the freed object's lifetime error, or the input that causes stale memory to be reused. The Extended Stable channel is affected before 118.0.2088.88; exploitation uses a local attack path, requires no prior privileges, and depends on user interaction.

CVSS severity7.3
High
EPSS probability2.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Chromium-based Microsoft Edge before 119.0.2151.44 allows attackers to execute code after user interaction. Microsoft has not disclosed the affected Edge component, the freed object's lifetime error, or the input that causes stale memory to be reused. The Extended Stable channel is affected before 118.0.2088.88; exploitation uses a local attack path, requires no prior privileges, and depends on user interaction.

The record

CVE
CVE-2023-36034
Published
Nov 3, 2023
Updated
Oct 8, 2025
Vendor
Microsoft
Product
Microsoft Edge (Chromium-based)
Classifications
CWE-416, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 3, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 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 <118.0.2088.88
  2. Affected versionversion=1.0.0 <119.0.2151.44

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Edge (Chromium-based)version=1.0.0 <118.0.2088.88; version=1.0.0 <119.0.2151.44

Published CVSS scores

7.3Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L

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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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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