Fortinet has patched a critical flaw in FortiSandbox, the appliance that detonates suspicious files and feeds malware verdicts to the rest of a Fortinet security deployment. The bug (CVE-2026-25089, rated 9.8) is an OS command injection in the web interface that lets a remote, unauthenticated attacker run arbitrary commands by sending crafted HTTP requests. Compromising a sandbox is especially dangerous because attackers can both pivot deeper into the network and blind the very system meant to catch malware. Fixed versions are FortiSandbox 5.0.6 and 4.4.9, with matching updates for the Cloud and PaaS editions.
Ubiquiti has shipped patches for five UniFi OS vulnerabilities, three of which are CVSS-maximum and exploitable by remote unauthenticated attackers. CVE-2026-34908 is an improper access control that lets attackers make unauthorized changes; CVE-2026-34909 is a path traversal that reaches an underlying system account; CVE-2026-34910 is an unauthenticated command injection. Two additional flaws (CVE-2026-33000, a critical command injection, and CVE-2026-34911, a high-severity info disclosure) were also patched. All five came through Ubiquiti's HackerOne program. Censys is tracking close to 100,000 internet-exposed UniFi OS endpoints, around 50,000 of them in the US. Ubiquiti products were previously hijacked into the GRU-operated Moobot botnet.
Atlassian's April 21 security bulletin disclosed CVE-2026-21571, a critical OS command injection in Bamboo Data Center and Server with CVSS 9.4. An authenticated attacker can execute arbitrary commands on the underlying server, leading to full system compromise and lateral movement. Affected branches: 9.6, 10.0, 10.1, 10.2, 11.0, 11.1, 12.0, 12.1. The same bulletin patches CVE-2026-33871 (CVSS 8.7) - a Netty HTTP/2 DoS that can knock CI/CD pipelines offline. Bamboo sits at the heart of build pipelines, giving attackers a clean path to tamper with artifacts and harvest pipeline secrets.