CVE-2026-7273
CGI buffer overflow on Zyxel GS1900-48HPv2 enables RCE via crafted HTTP.
Is CVE-2026-7273 being exploited?
Yes. CVE-2026-7273 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-7273?
CVE-2026-7273 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-7273?
Yes. A fix has been recorded for CVE-2026-7273. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-7273 affect?
CVE-2026-7273 affects Zyxel GS1900-48HPv2 switches (firmware <= 2.90(ABTQ.1)C0). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-7273?
Update firmware when available; restrict management network access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
LAN-based, unauthenticated attacker can execute OS commands via crafted HTTP request.
Immediate action required
- affected<= 2.90
- affected<= 2.90
- affected<= 2.90
- affected<= 2.90
- affected<= 2.90
- affected<= 2.90
- affected<= 2.90
- affected<= 2.90
- affected<= 2.90
- affected<= 2.90
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.