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Adobe Acrobat Reader Critical Vulnerability APSB26-44 Warning

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Summary

JPCERT/CC has issued alert JPCERT-AT-2026-0011 warning of critical vulnerabilities (APSB26-44) in Adobe Acrobat and Adobe Acrobat Reader for Windows and macOS. Exploitation could allow arbitrary code execution when a user opens a maliciously crafted PDF. Affected versions include Adobe Acrobat DC Continuous up to 26.001.21411 and Adobe Acrobat 2024 Classic up to 24.001.30362. JPCERT recommends updating immediately to patched versions 26.001.21431 (Continuous) or 24.001.30365 (2024 Classic).

“アドビからPDFファイル作成・変換ソフトウェアAdobe AcrobatおよびPDFファイル閲覧ソフトウェアAdobe Acrobat Readerにおける脆弱性に関する情報（APSB26-44）が公開されました。”

— JPCERT , verbatim from source
Why this matters

Organizations should treat this as a high-priority patching exercise given the arbitrary code execution risk. IT teams managing enterprise Adobe deployments should consider whether automated patch management can be applied to avoid manual updates across multiple workstations.

AI-drafted from the source document, validated against GovPing's analyst note standards . For the primary regulatory language, read the source document .
Published by JPCERT on jpcert.or.jp . Detected, standardized, and enriched by GovPing. Review our methodology and editorial standards .

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What changed

JPCERT/CC issued alert JPCERT-AT-2026-0011 on April 15, 2026, warning of critical vulnerabilities in Adobe Acrobat and Adobe Acrobat Reader (APSB26-44). The vulnerabilities affect Windows and macOS versions of Adobe Acrobat DC Continuous (26.001.21411 and earlier), Adobe Acrobat Reader DC Continuous (26.001.21411 and earlier), and Adobe Acrobat 2024 Classic (24.001.30362 and earlier for Windows; 24.001.30360 and earlier for macOS). Exploitation could allow arbitrary code execution via malicious PDF files. Organizations running any affected version of Adobe Acrobat or Reader should update immediately to version 26.001.21431 (Continuous track) or 24.001.30365 (2024 Classic). Updates can be performed via the Help menu or downloaded directly from Adobe.

What to do next

  1. Update Adobe Acrobat and Adobe Acrobat Reader to the latest version

Archived snapshot

Apr 23, 2026

GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.

Adobe AcrobatおよびReaderの脆弱性（APSB26-44）に関する注意喚起

最終更新: 2026-04-15
JPCERT-AT-2026-0011
JPCERT/CC
2026-04-15

I. 概要

アドビからPDFファイル作成・変換ソフトウェアAdobe AcrobatおよびPDFファイル閲覧ソフトウェアAdobe Acrobat Readerにおける脆弱性に関する情報（APSB26-44）が公開されました。脆弱性を悪用したコンテンツをユーザーが開いた場合、任意のコードが実行されるなどの可能性があります。詳細については、アドビの情報を確認してください。

アドビ
Security update available for Adobe Acrobat Reader | APSB26-44
https://helpx.adobe.com/security/products/acrobat/apsb26-44.html

II. 対象

対象となる製品とバージョンは次のとおりです。

  • Adobe Acrobat DC Continuous（26.001.21411）およびそれ以前（Windows、macOS）
  • Adobe Acrobat Reader DC Continuous（26.001.21411）およびそれ以前（Windows、macOS）
  • Adobe Acrobat 2024 Classic 2024（24.001.30362）およびそれ以前（Windows）
  • Adobe Acrobat 2024 Classic 2024（24.001.30360）およびそれ以前（macOS）

III. 対策

Adobe AcrobatおよびAdobe Acrobat Readerを次の最新のバージョンに更新してください。

  • Adobe Acrobat DC Continuous（26.001.21431）（Windows、macOS）
  • Adobe Acrobat Reader DC Continuous（26.001.21431）（Windows、macOS）
  • Adobe Acrobat 2024 Classic 2024（24.001.30365）（Windows、macOS）

更新は、Adobe AcrobatおよびAdobe Acrobat Readerの起動後、メニューの「ヘルプ」から「アップデートの有無をチェック」をクリックすることで実施できます。メニューからの更新が不可能な場合は、以下のURLから最新のAdobe AcrobatおよびAdobe Acrobat Readerをダウンロードしてください。詳細は、アドビの情報をご確認ください。

アドビ
Adobe Acrobat のダウンロード
https://helpx.adobe.com/jp/download-install/kb/download-install-acrobat-subscription.html

アドビ
Acrobat Pro 2024 をダウンロード
https://helpx.adobe.com/jp/acrobat/kb/download-acrobat-classic.html

IV. 参考情報

アドビ
Latest Product Security Updates
https://helpx.adobe.com/security.html

アドビ
Adobe Acrobat を手動で更新する
https://helpx.adobe.com/jp/acrobat/kb/install-updates-reader-acrobat.html

今回の件につきまして提供いただける情報がございましたら、JPCERT/CCまでご連絡ください。

一般社団法人JPCERTコーディネーションセンター（JPCERT/CC）
サイバーセキュリティコーディネーショングループ
Email：ew-info@jpcert.or.jp

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Related changes

Favicon for www.jpcert.or.jp Adobe Acrobat and Reader Vulnerability APSB26-43 Allows Arbitrary Code Execution
Urgent Apr 23, 2026 • Japan JPCERT Advisories • Data Privacy & Cybersecurity
Favicon for www.jpcert.or.jp JPCERT Warns of Critical Vulnerabilities in Adobe Acrobat and Reader Allowing Arbitrary Code Execution
Priority review Apr 23, 2026 • JPCERT EN alerts alt • Data Privacy & Cybersecurity
Favicon for www.jpcert.or.jp Adobe Acrobat and Reader Vulnerabilities Allow Code Execution
Priority review Apr 23, 2026 • JPCERT EN alerts alt • Data Privacy & Cybersecurity

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Classification

Agency
JPCERT
Published
April 15th, 2026
Instrument
Notice
Branch
International
Source language
ja
Legal weight
Non-binding
Stage
Final
Change scope
Substantive

Who this affects

Applies to
Technology companies
Industry sector
5112 Software & Technology
Activity scope
Vulnerability patching Security update deployment
Geographic scope
Japan JP

Taxonomy

Primary area
Cybersecurity
Operational domain
IT Security
Topics
Cybersecurity Product Safety

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