2026年6月9日の
セキュリティ情報

Subject: [Urgent] Check Point VPN CVE-2026-50751 Remediation

Dear Team,

We are sharing critical information regarding a vulnerability in Check Point VPN.

■ Overview
A critical authentication bypass vulnerability (CVE-2026-50751) has been discovered due to a logic flow weakness in certificate validation. It has a CVSS v3.1 score of 9.3.

■ Scope
- Affected Products: Check Point Remote Access VPN / Mobile Access
- Exploitation Conditions:
- VPN Remote Access or Mobile Access is enabled
- IKEv1 is enabled
- Gateways accept legacy Remote Access clients
- Machine certificates are not required

■ Action Plan
1. Apply the latest security updates provided by Check Point immediately.
2. Review IKEv1 configurations and disable it if not required.

■ Reference
- Check Point Official Advisory

Priority: High
Deadline: Immediate

Subject: [Security Advisory] Veeam Backup & Replication CVE-2026-44963

Dear IT Administration Team,

We are sharing critical information regarding a vulnerability in Veeam Backup & Replication.

■ Overview
A critical vulnerability (CVE-2026-44963) allows an authenticated domain user to achieve Remote Code Execution (RCE) on the Backup Server. The CVSS score is 9.4, indicating a high level of severity.

■ Scope
- Product: Veeam Backup & Replication
- Affected Versions: 12.3.2.4465 and all earlier version 12 builds
*Note: Version 13.x is not affected due to architectural changes.*

■ Remediation Steps
1. Verify the current version of your Veeam Backup & Replication installation.
2. If an affected version is in use, update to version 12.3.2.4854 or later immediately.

■ Reference
- Veeam Official Security Advisory

Priority: High
Deadline: Immediate

Subject: [Urgent] Check Point VPN Vulnerability CVE-2026-50751 Mitigation

Dear Team,

This is a technical alert regarding a critical vulnerability in Check Point VPN products.

■ Overview
An authentication bypass vulnerability (CVE-2026-50751) has been discovered in Check Point's VPN and Firewall solutions. This vulnerability is being actively exploited in the wild and has been added to CISA's Known Exploited Vulnerabilities (KEV) catalog.

■ Affected Products
- Mobile Access / SSL VPN
- Remote Access VPN
- Spark Firewall (multiple versions)
- Security Gateways

■ Action Required
1. Identify all Check Point VPN/Firewall instances in the environment.
2. Apply the latest security updates/patches provided by Check Point immediately.
3. Review the official advisory for specific mitigation steps if patching is not immediately possible.

■ Reference
- Check Point Security Advisory
- CISA KEV: CVE-2026-50751

Priority: High
Deadline: Immediate

Subject: [Urgent] SAP NetWeaver Critical Vulnerabilities (CVE-2026-44748, CVE-2026-27671)

Dear Team,

This is a technical alert regarding critical vulnerabilities identified in SAP products.

■ Overview
Critical flaws have been discovered in SAP NetWeaver, Commerce, and Data Hub. CVE-2026-44748 (CVSS 9.9) allows for XML Signature Wrapping in SAML authentication, potentially leading to unauthorized data access. CVE-2026-27671 (CVSS 9.8) involves memory corruption via improper RFC protocol validation.

■ Affected Scope
- SAP NetWeaver AS ABAP / ABAP Platform
- SAP Commerce
- SAP Data Hub

■ Remediation Steps
1. Review and apply the latest security notes provided by SAP.
2. As a temporary mitigation for CVE-2026-44748, consider disabling SAML authentication if patching is not immediately possible.

■ Reference
- SAP Security Notes / Onapsis Analysis

Priority: High
Deadline: Immediate

Subject: [Action Required] Please Update Your Adobe Software

Hi everyone,
Adobe has released security updates to fix several vulnerabilities in their software (including Acrobat and Reader). If left unpatched, these flaws could potentially allow unauthorized access to your system.

What we need you to do:
1. If you see an update notification for any Adobe product, please install it immediately.
2. Ensure that automatic updates are enabled for your Adobe applications.

Deadline: By the end of this week

件名: 【共有】Adobe製品 123件の脆弱性修正への対応について

お疲れさまです。Adobe製品の脆弱性修正に関する情報共有です。

■ 概要
Adobeが11製品にわたる123件の脆弱性を修正しました。特にAdobe Campaign ClassicにおいてCVSS 10.0のコード実行脆弱性が2件含まれており、非常に危険な状態です。また、Experience Manager (XSS等)、ColdFusion (権限昇格等)、Acrobat/Reader (メモリ露出等) でも多数の修正が行われています。

■ 影響範囲
- Adobe Campaign Classic
- Adobe Experience Manager
- Adobe ColdFusion
- Adobe Acrobat / Reader (Windows, macOS)
- Dreamweaver, InDesign, InCopy, Substance 3D Sampler 等

■ 対応手順
1. 社内で利用している上記製品のバージョンを確認する
2. Adobe公式の最新パッチを適用し、最新バージョンへアップデートする

■ 参考情報
- Adobe Security Bulletins

対応優先度: 高
対応期限: 速やかに

Subject: [Technical Alert] Adobe Security Updates for 123 Vulnerabilities

Hi team,
This is a technical alert regarding the latest Adobe Patch Tuesday updates.

■ Overview
Adobe has patched 123 vulnerabilities across 11 products. Most critical are two CVSS 10.0 vulnerabilities in Adobe Campaign Classic allowing arbitrary code execution. Other significant patches include fixes for Adobe Experience Manager (XSS), ColdFusion (Privilege Escalation), and Acrobat/Reader (DoS, Memory Exposure).

■ Scope
- Adobe Campaign Classic
- Adobe Experience Manager
- Adobe ColdFusion
- Adobe Acrobat / Reader (Windows, macOS)
- Dreamweaver, InDesign, InCopy, Substance 3D Sampler, etc.

■ Action Plan
1. Audit the current versions of Adobe software deployed across the environment.
2. Deploy the latest security patches provided by Adobe immediately.

■ Reference
- Adobe Security Bulletins

Priority: High
Deadline: Immediate

Subject: [Security Alert] Cisco Catalyst SD-WAN Manager CVE-2026-20245

Dear IT/Security Team,

We are sharing information regarding a critical zero-day vulnerability in Cisco Catalyst SD-WAN Manager.

■ Overview
CVE-2026-20245 is a validation error vulnerability that allows authenticated or local attackers to execute commands as root via command injection. This vulnerability is currently being exploited in the wild.

■ Affected Scope
- Cisco Catalyst SD-WAN Manager

■ Action Plan
1. Currently, no patch or workaround is available from the vendor.
2. Strictly limit access to the management interface and enhance monitoring for any unauthorized root-level activity or suspicious logs.
3. Monitor Cisco's official channels for the release of the security patch and apply it immediately upon availability.

■ Reference
- Cisco Official Advisory (Pending)

Priority: High
Deadline: Immediate upon patch release

Subject: [Urgent] Check Point VPN CVE-2026-50751 Remediation

Dear IT/Security Team,

We are sharing critical information regarding a vulnerability in Check Point VPN products.

■ Overview
A critical authentication bypass vulnerability (CVE-2026-50751) has been identified in Check Point VPNs. This flaw is currently being exploited in the wild by Qilin ransomware affiliates to establish unauthorized remote access.

■ Scope
- Check Point Remote Access VPN
- Mobile Access
- Spark firewalls
*Specifically affecting instances configured with the deprecated IKEv1 protocol and not requiring machine certificates.

■ Action Plan
1. Immediately apply the security updates released by Check Point.
2. Review the use of the IKEv1 protocol and migrate to secure alternatives where possible.

■ Reference
- Check Point Official Advisory
- CISA Directive

Priority: High
Deadline: Immediate (CISA recommends patching within 3 days)