Latest publications of type Security Advisories

2026-012: Critical Vulnerabilities in Check Point Products

Thu, 10 Sep 2026 10:20:06 CEST

On 9 September 2026, Check Point released emergency security updates addressing two critical vulnerabilities affecting Check Point Security Gateway, Security Management Server, and Spark Firewall deployments configured to use Remote Access VPN or Site-to-Site VPN. Both vulnerabilities carry a CVSS score of 9.8 and could allow an unauthenticated, remote attacker to execute arbitrary code on affected appliances.
CERT-EU strongly recommends applying the available hotfixes as soon as possible, prioritising internet-facing and perimeter appliances.

2026-011: Critical Vulnerabilities in SAP Kernel and NetWeaver Message Server

Wed, 09 Sep 2026 15:07:59 CEST

On 8 September 2026, as part of its September Security Patch Day, SAP released Security Notes addressing two critical vulnerabilities affecting a broad range of SAP products[3]. The most severe, CVE-2026-44756 (CVSS 10.0), is a memory corruption vulnerability in SAP Extended Passport (EPP) processing, nicknamed "OVERPASS" by the Onapsis Research Labs (ORL), which discovered and responsibly disclosed it[3]. The second, CVE-2026-58240 (CVSS 9.8), nicknamed "S4GET", is a missing authentication check in the SAP NetWeaver Message Server[6].
Both are remotely exploitable without authentication. According to the reporting researchers, successful exploitation of either can result in arbitrary operating system command execution under the account that owns the SAP installation, leading to full compromise of the affected system and the business data it holds[6].
CERT-EU strongly recommends applying SAP Security Notes 3747649 and 3759472 as soon as possible.

2026-010: Critical Vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway

Wed, 19 Aug 2026 18:13:47 CEST

On 19 August 2026, Citrix published a security advisory addressing multiple critical vulnerabilities in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway).
CERT-EU recommends updating affected devices as soon as possible.

2026-009: Critical Vulnerabilities in Microsoft SharePoint

Thu, 23 Jul 2026 09:13:03 CEST

[UPDATED] On 14 July 2026, Microsoft released security updates addressing critical remote code execution (RCE) vulnerabilities in Microsoft SharePoint Server. On 20 July 2026, WatchTowr identified a proof-of-concept exploit code and subsequently observed active exploitation of CVE-2026-50522, a vulnerability part of an ongoing series of actively exploited flaws affecting on-premise SharePoint Server instances, including CVE-2026-32201, CVE-2026-45659, CVE-2026-56164, and CVE-2026-58644.
CERT-EU strongly recommends updating affected servers immediately, rotating credentials for any assets that may have been exposed to the internet, and conducting a compromise assessment.

2026-008: Critical vulnerabilities in Ivanti Sentry

Wed, 10 Jun 2026 13:55:39 CEST

On 9 June 2026, Ivanti released a security advisory addressing two critical vulnerabilities in their Sentry products[1]. An attacker could exploit those flaws to achieve unauthenticated remote code execution on the vulnerable device.

2026-007: Critical Vulnerability in Windows Netlogon

Wed, 10 Jun 2026 08:47:08 CEST

On 12 May 2026, Microsoft published a security advisory addressing a critical vulnerability affecting Windows Server when acting as a domain controller. This vulnerability allows an unauthenticated attacker to execute arbitrary code over a network.
According to The Centre for Cybersecurity Belgium (CCB), this vulnerability is currently exploited by threat actors. It is strongly recommended updating affected Windows servers as soon as possible.

2026-006: Critical Vulnerability in PAN-OS

Wed, 06 May 2026 10:44:32 CEST

On 6 May 2026, Palo Alto published a security advisory addressing a critical vulnerability affecting PAN-OS. This vulnerability allows an unauthenticated attacker to execute arbitrary code with root privileges.
Palo Alto observed limited exploitation of this vulnerability. It is strongly recommended updating affected appliances as soon as patches will be available, and to apply workarounds and mitigation in the meantime.

2026-005: High Vulnerability in the Linux Kernel ("Copy Fail")

Thu, 30 Apr 2026 11:25:30 CEST

On 29 April 2026, a high local privilege escalation vulnerability in the Linux kernel, tracked as CVE-2026-31431 and named "Copy Fail", was publicly disclosed.
The vulnerability affects every mainstream Linux distributions shipping a kernel built since 2017. A public proof-of-concept exploit has been released.
As of the date of this advisory, no distribution has shipped a fixed kernel package. The mainline fix was committed on 1 April 2026, but vendor updates are still pending across all major distributions. CERT-EU strongly recommends applying the interim mitigation immediately, prioritising Kubernetes nodes, and CI/CD runners exposed to untrusted workloads.

2026-004: Critical Vulnerability in SharePoint Exploited

Wed, 25 Mar 2026 08:51:39 CET

On 17 March 2026, Microsoft updated one of its January 2026 security advisories related to a remote code execution vulnerability in Microsoft SharePoint. Specifically, Microsoft raised the CVSS score and changed the FAQ section to indicate that the vulnerability could be exploited by an unauthenticated attacker. This vulnerability was added in the CISA's Known Exploited Vulnerabilities (KEV) catalogue on 18 March 2026.
Additionally, three further RCE flaws affecting Microsoft SharePoint were addressed in the March 2026 release.
CERT-EU strongly recommends updating SharePoint servers as soon as possible, prioritising internet-facing assets. CERT-EU also encourages IT administrators to take necessary remediation actions.

2026-003: Multiple Vulnerabilities in Citrix NetScaler and Citrix ADC

Mon, 23 Mar 2026 19:03:59 CET

On 23 March 2026, Citrix published a security advisory addressing multiple vulnerabilities affecting NetScaler ADC and NetScaler Gateway. These vulnerabilities may lead to sensitive information disclosure and user session mix-up under specific configurations.
At the time of writing, there is no public evidence of active exploitation. It is strongly recommended updating affected gateways, prioritising internet-facing assets. It is also recommended to preserve evidence for further investigation.