Loading vulnerability…
CVE-2026-7273 is a stack-based buffer overflow in the CGI program of Zyxel GS1900 series switch firmware. A LAN-based unauthenticated attacker can send a crafted HTTP request to the affected management interface and potentially execute operating-system commands on the switch. Affected firmware includes GS1900-8 through version 2.90(AAHH.1)C0, GS1900-8HP through 2.90(AAHI.1)C0, GS1900-10HP through 2.90(AAZI.1)C0, GS1900-16 through 2.90(AAHJ.1)C0, GS1900-24 through 2.90(AAHL.1)C0, GS1900-24E through 2.90(AAHK.1)C0, GS1900-24EP through 2.90(ABTO.1)C0, GS1900-24HPv2 through 2.90(ABTP.1)C0, GS1900-48 through 2.90(AAHN.1)C0, and GS1900-48HPv2 through 2.90(ABTQ.1)C0.
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.
23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A pre-authentication remote-code-execution vulnerability affecting ZyXEL GS1900 Smart Managed Switches. A custom obfuscated Python exploit was used to collect and exfiltrate device configurations, hashed root credentials, and network information from 996 devices.
A stack-based buffer overflow in the CGI program of Zyxel GS1900 switch firmware that could allow a LAN-based unauthenticated attacker to execute OS commands via a crafted HTTP request and potentially take control of affected hardware.
A stack-based buffer overflow in the CGI program of Zyxel GS1900-48HPv2 firmware that may allow a LAN-based unauthenticated attacker to execute OS commands via a crafted HTTP request.
A stack-based buffer overflow in the CGI program of Zyxel GS1900 series switch firmware that could allow a LAN-based unauthenticated attacker to potentially execute OS commands via a crafted HTTP request.
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.