# Usg20-VPN Firmware vulnerabilities > Usg20-VPN Firmware is made by Zyxel. We track 15 published vulnerabilities in it, across 10 versions. 4 of them are on the list of flaws known to be exploited, the newest added on 5 June 2023. If you run Usg20-VPN Firmware, check your version against the exploited flaws below and patch those first. Canonical page: https://www.precursorintelligence.com/product/zyxel/usg20-vpn_firmware ## At a glance - **Made by:** [Zyxel](https://www.precursorintelligence.com/vendors/zyxel) - **Published vulnerabilities:** 15 - **Known to be exploited:** 4 - **Versions tracked:** 10 - **Most recently added to the known-exploited list:** [CVE-2023-33009](https://www.precursorintelligence.com/what-is/cve-2023-33009), 5 June 2023. We keep watching the list. ## Which versions of Usg20-VPN Firmware do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. "4.60 to before 5.36" means from 4.60 up to, but not including, 5.36. - [CVE-2023-33009](https://www.precursorintelligence.com/what-is/cve-2023-33009) (Zyxel Multiple Firewalls Buffer Overflow Vulnerability): 4.60 to before 5.36, 5.36, 5.36-patch1 - [CVE-2023-33010](https://www.precursorintelligence.com/what-is/cve-2023-33010) (Zyxel Multiple Firewalls Buffer Overflow Vulnerability): 4.30 to before 5.36, 5.36, 5.36-patch1 - [CVE-2020-9054](https://www.precursorintelligence.com/what-is/cve-2020-9054) (Zyxel Multiple NAS Devices OS Command Injection Vulnerability): 4.35 to before 4.35(abaq.3)c0 - [CVE-2020-29583](https://www.precursorintelligence.com/what-is/cve-2020-29583) (Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability): 4.60 ## Which Usg20-VPN Firmware vulnerabilities are being exploited? 4 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2023-33009](https://www.precursorintelligence.com/what-is/cve-2023-33009): Zyxel Multiple Firewalls Buffer Overflow Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 28%, known exploited since 5 June 2023. - [CVE-2023-33010](https://www.precursorintelligence.com/what-is/cve-2023-33010): Zyxel Multiple Firewalls Buffer Overflow Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 29%, known exploited since 5 June 2023. - [CVE-2020-9054](https://www.precursorintelligence.com/what-is/cve-2020-9054): Zyxel Multiple NAS Devices OS Command Injection Vulnerability. Critical, CVSS 9.8, chance of use in 30 days >99%, known exploited since 25 March 2022. - [CVE-2020-29583](https://www.precursorintelligence.com/what-is/cve-2020-29583): Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 90%, known exploited since 3 November 2021. ## Which Usg20-VPN Firmware flaws are most likely to be used? Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days): - [CVE-2020-9054](https://www.precursorintelligence.com/what-is/cve-2020-9054): >99%, Critical (CVSS 9.8), known exploited - [CVE-2020-29583](https://www.precursorintelligence.com/what-is/cve-2020-29583): 90%, Critical (CVSS 9.8), known exploited - [CVE-2021-35029](https://www.precursorintelligence.com/what-is/cve-2021-35029): 2.3%, Critical (CVSS 9.8) ## Questions ### How many vulnerabilities does Usg20-VPN Firmware have? We track 15 published vulnerabilities listed under the name Usg20-VPN Firmware, across 10 versions. The most recent Usg20-VPN Firmware flaw added to the known-exploited list is CVE-2023-33009, on 5 June 2023. ### Which Usg20-VPN Firmware vulnerabilities are being exploited? 4 are on the list of flaws known to be exploited. The most recently added are CVE-2023-33009, CVE-2023-33010 and CVE-2020-9054. ### Which versions of Usg20-VPN Firmware do the exploited flaws affect? Each flaw names its own versions, usually as ranges. The newest, CVE-2023-33009, affects 4.60 to before 5.36, 5.36, 5.36-patch1. The versions for every exploited flaw are listed on this page. ### How do I get alerts for Usg20-VPN Firmware? Create a Precursor Intelligence account and track Usg20-VPN Firmware. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook. ## Running Usg20-VPN Firmware? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact