Zyxel and Veeam Flaws Under Active Exploitation With Command and SYSTEM Access
AI summary · glm-5.3Summaries by Vani AI
Zyxel disclosed an active exploitation of a stack-based buffer overflow in its GS1900 switch firmware (CVE-2026-7273), enabling OS command execution.
Zyxel disclosed a stack-based buffer overflow in its GS1900 switch firmware (CVE-2026-7273, CVSS 8.8) that enables OS command execution, with evidence of active exploitation.
Key facts
- Zyxel GS1900 switch firmware has a stack-based buffer overflow (CVE-2026-7273, CVSS 8.8) that allows OS command execution via crafted HTTP requests.
- The flaw has been patched in multiple firmware versions, but CISA has not confirmed active exploitation yet.
- CVEs
- CVE-2026-7273
- ATT&CK
- T1566.001 Command and Scripting InteractionT1059 Execution of a Script Within a ProcessT1078 Execution of a Script Within a Process
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-7273 | Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability | 8.8 | 3% | KEVPoC | KEV |
From the original article
2 min read at thehackernews.com
The U. S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday added a now-patched security flaw impacting Zyxel GS1900 series switches to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation.
thehackernews.com
A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.