Nas540 Firmware vulnerabilitiesAnd the versions its exploited flaws hit.
Nas540 Firmware is made by Zyxel. We track 5 published vulnerabilities in it, across 5 versions. 2 of them are on the list of flaws known to be exploited, the newest added on 23 June 2023. If you run Nas540 Firmware, check your version against the exploited flaws below and patch those first.
The most recent Nas540 Firmware flaw added to the known-exploited list is CVE-2023-27992, on 23 June 2023. We keep watching the known-exploited list.
Which versions of Nas540 Firmware do the exploited flaws hit?
Each exploited flaw lists the versions it affects, usually as ranges. "before 5.21(aatb.11)c0" means every version up to, but not including, 5.21(aatb.11)c0. Find your version, then patch.
- CVE-2023-27992Exploited list, 23 Jun 2023
Zyxel Multiple NAS Devices Command Injection Vulnerability
before 5.21(aatb.11)c0 - CVE-2020-9054Exploited list, 25 Mar 2022
Zyxel Multiple NAS Devices OS Command Injection Vulnerability
before 5.21(aatb.4)c0
Which Nas540 Firmware 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.
- 9.8Zyxel Multiple NAS Devices Command Injection Vulnerability
Multiple Zyxel network-attached storage (NAS) devices contain a pre-authentication command injection vulnerability that could allow an unauthenticated attacker to execute commands remotely via a crafted HTTP request.
- 9.8Zyxel 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.
Which Nas540 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. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- >99%
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...
- 83%
The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to...
- 1.4%CVE-2023-27988High
The post-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.13)C0 could allow an authenticated attacker with administrator privileges to execute some operating...
- 1.2%CVE-2020-13364High
A backdoor in certain Zyxel products allows remote TELNET access via a CGI script.
- 1.0%CVE-2020-13365High
Certain Zyxel products have a locally accessible binary that allows a non-root user to generate a password for an undocumented user account that can be used for a TELNET session as root.
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1 flaw being exploited affects software Acme tracks
Multiple Zyxel network-attached storage (NAS) devices contain a pre-authentication command injection vulnerability that could allow an unauthenticated attacker to execute commands remotely via a crafted HTTP request.
- Matched to
- Nas540 Firmware on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 5 published vulnerabilities listed under the name Nas540 Firmware, across 5 versions. The most recent Nas540 Firmware flaw added to the known-exploited list is CVE-2023-27992, on 23 June 2023.
2 are on the list of flaws known to be exploited. The most recently added are CVE-2023-27992 and CVE-2020-9054.
Each flaw names its own versions, usually as ranges. The newest, CVE-2023-27992, affects before 5.21(aatb.11)c0. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Nas540 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.