CVE & CISA-KEV Catalog

CVE-2021-35031

MEDIUM
6.8
CVSS v3
NVD

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.

CWE-78OS Command Injection

How to fix

Remediation Available
gs1900-10hp firmwareNVD
Affected:< 2.70(aazi.0)-20211208Fixed in:2.70(aazi.0)-20211208CVE-2021-35031derived from NVD
gs1900-16 firmwareNVD
Affected:< 2.70(aahj.0)-20211208Fixed in:2.70(aahj.0)-20211208CVE-2021-35031derived from NVD
gs1900-24 firmwareNVD
Affected:< 2.70(aahl.0)-20211208Fixed in:2.70(aahl.0)-20211208CVE-2021-35031derived from NVD
gs1900-24e firmwareNVD
Affected:< 2.70(aahk.0)-20211208Fixed in:2.70(aahk.0)-20211208CVE-2021-35031derived from NVD
gs1900-24ep firmwareNVD
Affected:< 2.70(abto.0)-20211208Fixed in:2.70(abto.0)-20211208CVE-2021-35031derived from NVD
gs1900-24hp firmwareNVD
Affected:< 2.70(aahm.0)-20211208Fixed in:2.70(aahm.0)-20211208CVE-2021-35031derived from NVD
gs1900-24hpv2 firmwareNVD
Affected:< 2.70(aatp.0)-20211208Fixed in:2.70(aatp.0)-20211208CVE-2021-35031derived from NVD
gs1900-48 firmwareNVD
Affected:< 2.70(aahn.0)-20211208Fixed in:2.70(aahn.0)-20211208CVE-2021-35031derived from NVD
gs1900-48hp firmwareNVD
Affected:< 2.70(aaho.0)-20211208Fixed in:2.70(aaho.0)-20211208CVE-2021-35031derived from NVD
gs1900-48hpv2 firmwareNVD
Affected:< 2.70(abtq.0)-20211208Fixed in:2.70(abtq.0)-20211208CVE-2021-35031derived from NVD
gs1900-8 firmwareNVD
Affected:< 2.70(aahh.0)-20211208Fixed in:2.70(aahh.0)-20211208CVE-2021-35031derived from NVD
gs1900-8hp firmwareNVD
Affected:< 2.70(aahi.0)-20211208Fixed in:2.70(aahi.0)-20211208CVE-2021-35031derived from NVD
xgs1210-12 firmwareNVD
Affected:< 1.00(abty.5)c0Fixed in:1.00(abty.5)c0CVE-2021-35031derived from NVD
xgs1250-12 firmwareNVD
Affected:< 1.00(abwe.1)c0Fixed in:1.00(abwe.1)c0CVE-2021-35031derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.46%probability of exploitation in 30 days
37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Patch1

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2021-1498Critical9.8100%KEVFix
CVE-2014-6271Critical9.8100%KEVFix
CVE-2019-16920Critical9.8100%KEV-
CVE-2022-44877Critical9.8100%KEVFix
CVE-2020-8515Critical9.8100%KEV-
CVE-2020-9054Critical9.8100%KEVFix
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CVE-2021-35031 severity badge

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.