Latest publications of type Security Advisories

2026-016: Critical Vulnerability in GitLab CE and EE

Mon, 12 Oct 2026 14:57:02 CEST

On 12 October 2026, GitLab released versions 19.4.2, 19.3.4 and 19.2.8 of GitLab Community Edition (CE) and Enterprise Edition (EE), fixing 24 security issues among which a critical vulnerability that could allow an unauthenticated attacker to execute arbitrary code on the server.
CERT-EU strongly recommends upgrading self-managed GitLab CE/EE instances to a fixed version as soon as possible, starting with internet-facing instances.

2026-015: Critical Vulnerability in Multiple Atlassian Products

Wed, 07 Oct 2026 09:52:48 CEST

On 5 October 2026, Atlassian published a security advisory addressing a critical arbitrary file access vulnerability. It affects Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crowd Data Center, Crucible and Fisheye.
CERT-EU strongly recommends upgrading all affected installations to a fixed version as soon as possible, starting with instances accessible from the internet. CERT-EU also recommends checking access logs for signs of exploitation.

2026-014: Critical Vulnerabilities in Citrix NetScaler ADC and Gateway

Sun, 27 Sep 2026 19:40:52 CEST

On 27 September 2026, Citrix published a security bulletin addressing 8 vulnerabilities affecting customer-managed Citrix NetScaler ADC and Citrix NetScaler Gateway, among which 2 critical unauthenticated Remote Code Execution (RCE) vulnerabilities. Citrix has confirmed active exploitation of these 2 critical vulnerabilities in the wild.
CERT-EU recommends updating affected software and running a compromise assessment on those exposed on the internet.

2026-013: Critical Vulnerability in F5 BIG-IP APM

Tue, 22 Sep 2026 18:52:36 CEST

On 22 September 2026, F5 published an advisory addressing a critical vulnerability affecting its BIG-IP APM product. The vendor confirmed active exploitation in the wild.
CERT-EU recommends taking appropriate actions as soon as possible.

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.