Coverage › CVE-2023-28771
CVE-2023-28771 Unmapped
Zyxel Multiple Firewalls OS Command Injection Vulnerability
- Vendor / product
- Zyxel — Multiple Firewalls
- Description (CISA)
- Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker to execute OS commands remotely by sending crafted packets to an affected device.
- Added to KEV
- 2023-05-31
- Due date
- 2023-06-21
- Required action
- Apply updates per vendor instructions.
- Known ransomware use
- Unknown
- CWE
- CWE-78
- CISA notes
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls
https://nvd.nist.gov/vuln/detail/CVE-2023-28771 - Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2023-28771. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-78) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.