Loading vulnerability…
CVE-2025-9133 is a missing authorization vulnerability in Zyxel ZLD firmware affecting ATP series, USG FLEX series, USG FLEX 50(W) series, and USG20(W)-VPN series devices within the specified firmware ranges. The flaw exists in the authentication and authorization flow of the web management interface, and potentially other management endpoints, when two-factor authentication is enabled. After a user successfully completes only the first authentication stage with valid username and password credentials, the device creates a session object. Due to improper authorization logic, that pre-2FA session is not adequately restricted and can be used to access sensitive resources before second-factor verification is completed. As a result, a semi-authenticated attacker can view and download the device system configuration.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A missing authorization vulnerability in Zyxel ZLD firewall firmware that could allow a semi-authenticated attacker to bypass full 2FA completion and access system configuration data.
A vulnerability listed as trending; no technical details provided in the content.
A missing authorization flaw in Zyxel ZLD firmware that allows attackers with valid credentials to access sensitive configuration data after completing only the first factor of two-factor authentication.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.