CVE-2020-9054
Scores
EPSS
Percentile: 94.3%
CVSS
CVSS Score: 9.8/10
All CVSS Scores
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
High (H)
Measures the impact to the confidentiality of information
Integrity Impact
High (H)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
High (H)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
Complete
Measures the impact to the confidentiality of information
Integrity Impact
Complete
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Complete
Measures the impact to the availability of the impacted component
Description
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 arbitrary code on a vulnerable device. ZyXEL NAS devices achieve authentication by using the weblogin.cgi CGI executable. This program fails to properly sanitize the username parameter that is passed to it. If the username parameter contains certain characters, it can allow command injection with the privileges of the web server that runs on the ZyXEL device. Although the web server does not run as the root user, ZyXEL devices include a setuid utility that can be leveraged to run any command with root privileges. As such, it should be assumed that exploitation of this vulnerability can lead to remote code execution with root privileges. By sending a specially-crafted HTTP POST or GET request to a vulnerable ZyXEL device, a remote, unauthenticated attacker may be able to execute arbitrary code on the device. This may happen by directly connecting to a device if it is directly exposed to an attacker. However, there are ways to trigger such crafted requests even if an attacker does not have direct connectivity to a vulnerable devices. For example, simply visiting a website can result in the compromise of any ZyXEL device that is reachable from the client system. Affected products include: NAS326 before firmware V5.21(AAZF.7)C0 NAS520 before firmware V5.21(AASZ.3)C0 NAS540 before firmware V5.21(AATB.4)C0 NAS542 before firmware V5.21(ABAG.4)C0 ZyXEL has made firmware updates available for NAS326, NAS520, NAS540, and NAS542 devices. Affected models that are end-of-support: NSA210, NSA220, NSA220+, NSA221, NSA310, NSA310S, NSA320, NSA320S, NSA325 and NSA325v2
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Sources
CWEs
Related Vulnerabilities
Exploits
Exploit ID: CVE-2020-9054
Source: cisa
URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Vulnerable Software (27)
Type: Configuration
Vendor: *
Product: atp100_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abps.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abps.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: atp200_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abfw.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abfw.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: atp500_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abfu.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abfu.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: atp800_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abiq.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abiq.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: nas326_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.21\\(aazf.7\\)c0", "vulner...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.21\\(aazf.7\\)c0", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:nas326:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: nas520_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:nas520_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.21\\(aasz.3\\)c0", "vulner...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:nas520_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.21\\(aasz.3\\)c0", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:nas520:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: nas540_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:nas540_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.21\\(aatb.4\\)c0", "vulner...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:nas540_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.21\\(aatb.4\\)c0", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:nas540:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: nas542_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.21\\(abag.4\\)c0", "vulner...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.21\\(abag.4\\)c0", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:nas542:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg1100_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg1100_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aapk.3\\)c0", "versi...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg1100_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aapk.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg1100:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg110_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg110_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aaph.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg110_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aaph.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg110:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg1900_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg1900_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aapl.3\\)c0", "versi...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg1900_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aapl.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg1900:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg20-vpn_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abaq.3\\)c0", "ver...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg20-vpn_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abaq.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg20w-vpn_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abar.3\\)c0", "ve...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg20w-vpn_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abar.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg20w-vpn:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg210_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg210_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aapi.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg210_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aapi.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg210:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg2200_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg2200_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abae.3\\)c0", "versi...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg2200_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(abae.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg2200:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg310_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg310_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aapj.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg310_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aapj.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg310:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg40_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg40_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aala.3\\)c0", "version...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg40_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aala.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg40:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg40w_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg40w_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aalb.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg40w_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aalb.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg40w:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg60_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg60_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aaky.3\\)c0", "version...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg60_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aaky.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg60:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd
Type: Configuration
Vendor: *
Product: usg60w_firmware
Operating System: * * *
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg60w_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aakz.3\\)c0", "versio...
{ "children": [ { "cpe_match": [ { "cpe23uri": "cpe:2.3:o:zyxel:usg60w_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.35\\(aakz.3\\)c0", "versionStartIncluding": "4.35", "vulnerable": true } ], "operator": "OR" }, { "cpe_match": [ { "cpe23uri": "cpe:2.3:h:zyxel:usg60w:-:*:*:*:*:*:*:*" } ], "operator": "OR" } ], "operator": "AND"}
Source: nvd