CVE-2021-35031

CVSS V2 High 7.7 CVSS V3 High 8
Description
A vulnerability in the TFTP client of Zyxel GS1900 series firmware, XGS1210 series firmware, and XGS1250 series firmware, which could allow an authenticated LAN user to execute arbitrary OS commands via the GUI of the vulnerable device.
Overview
  • CVE ID
  • CVE-2021-35031
  • Assigner
  • security@zyxel.com.tw
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-12-28T11:15:07
  • Last Modified Date
  • 2022-01-07T16:59:51
Weakness Enumerations
CWE URL
CWE-78 http://cwe.mitre.org/data/definitions/78.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aahh.0\)-20211208
cpe:2.3:h:zyxel:gs1900-8:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aahi.0\)-20211208
cpe:2.3:h:zyxel:gs1900-8hp:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aazi.0\)-20211208
cpe:2.3:h:zyxel:gs1900-10hp:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aahj.0\)-20211208
cpe:2.3:h:zyxel:gs1900-16:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aahk.0\)-20211208
cpe:2.3:h:zyxel:gs1900-24e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-24ep_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(abto.0\)-20211208
cpe:2.3:h:zyxel:gs1900-24ep:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aahl.0\)-20211208
cpe:2.3:h:zyxel:gs1900-24:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-24hp_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aahm.0\)-20211208
cpe:2.3:h:zyxel:gs1900-24hp:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-24hpv2_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aatp.0\)-20211208
cpe:2.3:h:zyxel:gs1900-24hpv2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aahn.0\)-20211208
cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(aaho.0\)-20211208
cpe:2.3:h:zyxel:gs1900-48hp:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:gs1900-48hpv2_firmware:*:*:*:*:*:*:*:* 1 OR 2.70\(abtq.0\)-20211208
cpe:2.3:h:zyxel:gs1900-48hpv2:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:xgs1210-12_firmware:*:*:*:*:*:*:*:* 1 OR 1.00\(abty.5\)c0
cpe:2.3:h:zyxel:xgs1210-12:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:zyxel:xgs1250-12_firmware:*:*:*:*:*:*:*:* 1 OR 1.00\(abwe.1\)c0
cpe:2.3:h:zyxel:xgs1250-12:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:A/AC:L/Au:S/C:C/I:C/A:C
  • Access Vector
  • ADJACENT_NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.7
  • Severity
  • HIGH
  • Exploitability Score
  • 5.1
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • ADJACENT_NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.1
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.zyxel.com/support/Zyxel_security_advisory_for_OS_command_injection_vulnerabilities_of_switches.shtml Patch Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-35031
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35031
History
Created Old Value New Value Data Type Notes
2022-05-10 06:38:05 Added to TrackCVE
2022-12-06 05:16:45 2021-12-28T11:15Z 2021-12-28T11:15:07 CVE Published Date updated
2022-12-06 05:16:45 2022-01-07T16:59:51 CVE Modified Date updated
2022-12-06 05:16:45 Analyzed Vulnerability Status updated