Usg1100 vulnerabilitiesAnd the versions its exploited flaws hit.

Product2 known exploited0 versions
The short answer

Usg1100 is made by Zyxel. We track 7 published vulnerabilities listed under that exact name, across 0 versions. 2 of them are on the list of flaws known to be exploited, the newest added on 25 March 2022. Zyxel lists newer releases under their own names, such as Usg1100 Firmware, so check those pages too.

Check your version

The most recent Usg1100 flaw added to the known-exploited list is CVE-2020-9054, on 25 March 2022. We keep watching the known-exploited list.

Other names

Is Usg1100 listed under other names? Yes.

Zyxel also lists Usg1100 under more specific names, such as Usg1100 Firmware. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.

Versions

Which versions of Usg1100 do the exploited flaws hit?

Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.

Known exploited

Which Usg1100 vulnerabilities are being exploited?

2 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.

  1. 9.8
    CVE-2020-9054CriticalKnown exploited
    Zyxel Multiple NAS Devices OS Command Injection Vulnerability

    Multiple Zyxel network-attached storage (NAS) devices contain a pre-authentication command injection vulnerability, which may allow a remote, unauthenticated attacker to execute arbitrary code.

    Chance of use>99%Known exploited since25 Mar 2022
  2. 9.8
    CVE-2020-29583CriticalKnown exploited
    Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability

    Zyxel firewalls (ATP, USG, VM) and AP Controllers (NXC2500 and NXC5500) contain a use of hard-coded credentials vulnerability in an undocumented account ("zyfwp") with an unchangeable password.

    Chance of use90%Known exploited since3 Nov 2021
Exploit likelihood

Which Usg1100 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. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.

50% or more10% to 49%Under 10%
  1. >99%
    CVE-2020-9054CriticalKnown exploited

    Multiple ZyXEL network-attached storage (NAS) devices running firmware version 5.21 contain a pre-authentication command injection vulnerability, which may allow a remote, unauthenticated attacker to execute...

    CVSS9.8Published4 Mar 2020
  2. 90%
    CVE-2020-29583CriticalKnown exploited

    Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password.

    CVSS9.8Published22 Dec 2020
  3. 44%

    Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator.

    CVSS9.1Published27 Jun 2019
  4. 6.4%

    A reflective Cross-site scripting (XSS) vulnerability in the free_time_failed.cgi CGI program in selected Zyxel ZyWall, USG, and UAG devices allows remote attackers to inject arbitrary web script or HTML via the...

    CVSS6.1Published27 Jun 2019
  5. 4.4%

    A stack-based buffer overflow in fbwifi_continue.cgi on Zyxel UTM and VPN series of gateways running firmware version V4.30 through to V4.55 allows remote unauthenticated attackers to execute arbitrary code via a...

    CVSS9.8Published27 Nov 2020
  6. 2.3%

    An authentication bypasss vulnerability in the web-based management interface of Zyxel USG/Zywall series firmware versions 4.35 through 4.64 and USG Flex, ATP, and VPN series firmware versions 4.35 through 5.01,...

    CVSS9.8Published2 Jul 2021
Precursor Intelligence

Running Usg1100? We'll keep checking.

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FAQ

Common questions, answered plainly.

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We track 7 published vulnerabilities listed under the name Usg1100, across 0 versions. The most recent Usg1100 flaw added to the known-exploited list is CVE-2020-9054, on 25 March 2022.

2 are on the list of flaws known to be exploited. The most recently added are CVE-2020-9054 and CVE-2020-29583.

Zyxel also lists Usg1100 under more specific names, such as Usg1100 Firmware. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.

Create a Precursor Intelligence account and track Usg1100. 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.