CVE-2024-39420

Acrobat Reader | Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)

HIGH

CVSS Score

Published: August 14, 2024 at 03:07 PM UTC

Updated: June 17, 2026 at 07:41 AM UTC

3 products affected across 1 vendorAcrobat ReaderAcrobatAcrobat DC· also runs on 2 platforms

Using Acrobat Reader by Adobe?

Get instant alerts when new vulnerabilities affect Acrobat Reader - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7

Exploit prediction

EPSS 3%

SSVC

No known exploit

Description

Acrobat Reader versions 20.005.30636, 24.002.21005, 24.001.30159, 20.005.30655, 24.002.20965, 24.002.20964, 24.001.30123, 24.003.20054 and earlier are affected by a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability that could lead to arbitrary code execution. This vulnerability arises when the timing of actions changes the state of a resource between the checking of a condition and the use of the resource, allowing an attacker to manipulate the resource in a harmful way. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Acrobat · Adobe

95%

v ≤ 24.001.3012320.0 ≤ v ≤ 20.005.3063520.0 ≤ v ≤ 20.005.3063620.001.30005 ≤ v < 20.005.3065524.001.20604 ≤ v < 24.001.3015920.0

Affected range stops below 20.005.30655, so it looks safe — our inference, not a vendor statement

Affected range stops below 24.001.30159, so it looks safe — our inference, not a vendor statement

apple-macos (environment) · microsoft-windows (environment)

Acrobat DC · Adobe

95%

v ≤ 24.002.20964v ≤ 24.002.2099115.008.20082 ≤ v < 24.002.21005

Affected range stops below 24.002.21005, so it looks safe — our inference, not a vendor statement

apple-macos (environment) · microsoft-windows (environment)

Acrobat Reader · Adobe

95%

v ≤ 20.005.30635v ≤ 20.005.30636v ≤ 24.003.2005420.001.3005 ≤ v < 20.005.30655

Affected range stops below 20.005.30655, so it looks safe — our inference, not a vendor statement

apple-macos (environment) · microsoft-windows (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

macOS · Apple

95%

Windows · Microsoft

95%

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://helpx.adobe.com/security/products/acrobat/apsb24-70.html

References (2)

Vendor Advisory

Source: [email protected]

https://helpx.adobe.com/security/products/acrobat/apsb24-70.html

Source: af854a3a-2127-422b-91ae-364da2661108

https://www.talosintelligence.com/vulnerability_reports/TALOS-2024-2011

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7HIGHadobe

Attack Vector: LOCAL
Complexity: HIGH
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-367

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card