Cyber Resilience

CVE-2023-26417

Memory Safety in Adobe Acrobat 20.001.3005 – 20.005.30441

Memory Safety
Published
12 April 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 7.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.026 84th percentile
Risk Priority 65 floored blend · peak EPSS

Summary

CVE-2023-26417 is a high-severity Use After Free (CWE-416) vulnerability in Adobe Acrobat. Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked in the top 16% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

Adobe Acrobat Reader versions 23.001.20093 and earlier, along with versions 20.005.30441 and earlier, contain a Use After Free vulnerability tracked as CVE-2023-26417. The flaw is assigned CWE-416 and carries a CVSS 3.1 score of 7.8, reflecting local attack vector, low complexity, and no required privileges.

An attacker can exploit the issue by supplying a malicious file that a victim must open; successful exploitation grants arbitrary code execution in the context of the current user. The requirement for user interaction limits remote, unauthenticated attacks but still enables targeted delivery through email or web downloads.

The Adobe security advisory APSB23-24, referenced at helpx.adobe.com, addresses the vulnerability and directs users to apply the vendor-supplied updates that remediate the use-after-free condition in the affected Acrobat Reader releases.

EPSS for the CVE rose materially from a low baseline near its initial value to a peak of 0.0735 on 2025-01-22 before receding to the current 0.0024, indicating a period of increased exploitation interest well after public disclosure.

EU & UK References

Vulnerability Data

Adobe Acrobat Reader versions 23.001.20093 (and earlier) and 20.005.30441 (and earlier) are affected by a Use After Free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction…

more

in that a victim must open a malicious file.

CWE(s)
CWE-416

Related Threats

MITRE ATT&CK Enterprise Techniques

T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-27159Same product: Adobe Acrobat
CVE-2023-44361Same product: Adobe Acrobat
CVE-2024-34100Same product: Adobe Acrobat
CVE-2024-34095Same product: Adobe Acrobat
CVE-2024-30305Same product: Adobe Acrobat
CVE-2025-43574Same product: Adobe Acrobat
CVE-2023-44371Same product: Adobe Acrobat
CVE-2025-43573Same product: Adobe Acrobat
CVE-2023-44367Same product: Adobe Acrobat
CVE-2025-43550Same product: Adobe Acrobat

Affected Assets

adobe
acrobat
20.001.3005 — 20.005.30441
adobe
acrobat dc
15.008.20082 — 23.001.20093
adobe
acrobat reader
20.001.3005 — 20.005.30441
adobe
acrobat reader dc
15.008.20082 — 23.001.20093

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 3 hardening rules · 3 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V1.4.3

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-416

Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly incorporate memory-safety tooling and reviews that prevent most use-after-free defects.

ID.RA-01 partial match
prevents

Vulnerability identification processes can discover use-after-free issues via scanning or analysis but do not prevent their introduction.

PR.PS-02 partial match
prevents

Routine patching removes known use-after-free instances after they have been introduced in released software.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect use-after-free bugs before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates memory-safety practices that reduce use-after-free defects.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify memory-management rules that mitigate use-after-free.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles include memory-safety design choices that limit use-after-free exposure.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly prescribe avoidance of use-after-free patterns.

A.8.32 Change management partial match
prevents

Change-management processes help ensure memory-safety fixes are deployed consistently.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Oracle Linux 8 (1 rule)
  • V-248592 OL 8 must clear memory when it is freed to prevent use-after-free attacks. prevents CWE-416
RHEL 8 (1 rule)
  • V-230279 RHEL 8 must clear memory when it is freed to prevent use-after-free attacks. prevents CWE-416
RHEL 9 (1 rule)
  • V-257794 RHEL 9 must clear memory when it is freed to prevent use-after-free attacks. prevents CWE-416

References