Improper Neutralization of Special Elements used in a Command

CWE-77

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Many protocols and products have their own custom command language. While OS or shell command strings are frequently discovered and targeted, developers may not realize that these other command languages might also be vulnerable to attacks.

We track 2,127 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.8. 41 have been exploited in real attacks.

How this weakness is prevented

Architecture and Design: If at all possible, use library calls rather than external processes to recreate the desired functionality.
Implementation: If possible, ensure that all external commands called from the program are statically created.
Operation: Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.
System Configuration: Assign permissions that prevent the user from accessing/opening privileged files.

Latest Improper Neutralization of Special Elements used in a Command vulnerabilities

7.8 High severity
Windows 10 Version 1607: Improper Neutralization of Special Elements used in a Command
CVE-2026-32183Apr 14, 2026Microsoft
Improper neutralization of special elements used in a command ('command injection') in Windows Snipping Tool allows an unauthorized attacker to execute code locally.
7.1 High severity
CPython: Improper Neutralization of Special Elements used in a Command
CVE-2026-4786Apr 13, 2026Python Software Foundation
Mitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open()" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6195Apr 13, 2026TOTOLINKEPSS 13.7%
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setPasswordCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument admpass leads to os comm
7.3 High severity
N300RH: Improper Neutralization of Special Elements used in a Command
CVE-2026-6158Apr 13, 2026TOTOLINKEPSS 1.58%
A flaw has been found in Totolink N300RH 6.1c.1353_B20190305. Affected is the function setUpgradeUboot of the file upgrade.so. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploi
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6156Apr 13, 2026TOTOLINKEPSS 1.85%
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setIpQosRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument Comment leads to os command injection.
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6155Apr 13, 2026TOTOLINKEPSS 1.84%
A weakness has been identified in Totolink A7100RU 7.4cu.2313. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument pppoeServiceName can lead to os command inject
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6154Apr 13, 2026TOTOLINKEPSS 1.85%
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. The affected element is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument wizard results in os comman
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6140Apr 13, 2026TOTOLINKEPSS 2.24%
A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument FileName results in os command injection.
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6139Apr 13, 2026TOTOLINKEPSS 1.85%
A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument FileName leads to os command injection. The at
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6138Apr 13, 2026TOTOLINKEPSS 1.85%
A flaw has been found in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setAccessDeviceCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument mac causes os command injection. The attack
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6132Apr 12, 2026TOTOLINKEPSS 2.21%
A vulnerability was determined in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setLedCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument enable causes os command injection. Remot
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6131Apr 12, 2026TOTOLINKEPSS 1.85%
A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this vulnerability is the function setTracerouteCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument command results in os command in
7.3 High severity
chatbox: Improper Neutralization of Special Elements used in a Command
CVE-2026-6130Apr 12, 2026ChatboxaiEPSS 1.56%
A flaw has been found in chatboxai chatbox up to 1.20.0. This impacts the function StdioClientTransport of the file src/main/mcp/ipc-stdio-transport.ts of the component Model Context Protocol Server Management System. Executing a manipulation of the argument a
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6116Apr 12, 2026TOTOLINKEPSS 1.84%
A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This vulnerability affects the function setDiagnosisCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument ip leads to os command injection. R
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6115Apr 12, 2026TOTOLINKEPSS 1.85%
A flaw has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setAppCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument enable can lead to os command injection. The attack may
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6114Apr 12, 2026TOTOLINKEPSS 1.84%
A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setNetworkCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument proto results in os command inj
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6113Apr 12, 2026TOTOLINKEPSS 1.84%
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this vulnerability is the function setTtyServiceCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument ttyEnable lead
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6112Apr 12, 2026TOTOLINKEPSS 1.84%
A weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument maxRtrAdvInterval causes os command injection. The at
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6029Apr 10, 2026TOTOLINKEPSS 3.03%
A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. The affected element is the function setVpnAccountCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument User results in os command injection. T
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6028Apr 10, 2026TOTOLINKEPSS 3.03%
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function setPptpServerCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument enable leads to os command injection.
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6027Apr 10, 2026TOTOLINKEPSS 2.54%
A weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. This issue affects the function setUrlFilterRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument enable can lead to os command inj
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6026Apr 10, 2026TOTOLINKEPSS 3.03%
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This vulnerability affects the function setPortalConfWeChat of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument enable results in
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-6025Apr 10, 2026TOTOLINKEPSS 3.05%
A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setSyslogCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument enable leads to os command injection. It is possibl
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5997Apr 10, 2026TOTOLINKEPSS 1.84%
A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setLoginPasswordCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument admpass results in os command inject
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5996Apr 10, 2026TOTOLINKEPSS 1.85%
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. The affected element is the function setAdvancedInfoShow of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument tty_server leads to os
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5995Apr 10, 2026TOTOLINKEPSS 1.85%
A weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function setMiniuiHomeInfoShow of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument lan_info can lead to os command inje
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5994Apr 10, 2026TOTOLINKEPSS 1.84%
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This issue affects the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument telnet_enabled results in os com
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5993Apr 10, 2026TOTOLINKEPSS 1.84%
A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. This vulnerability affects the function setWiFiGuestCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wifiOff leads to os command inject
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5978Apr 9, 2026TOTOLINKEPSS 1.84%
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument mode leads to os command injection. Th
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5977Apr 9, 2026TOTOLINKEPSS 2.2%
A weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function setWiFiBasicCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument wifiOff can lead to os command injection.
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5976Apr 9, 2026TOTOLINKEPSS 1.84%
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setStorageCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument sambaEnabled results in os command in
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5975Apr 9, 2026TOTOLINKEPSS 1.84%
A vulnerability was identified in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setDmzCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument wanIdx leads to os command injection. The a
9.8 Critical severity
MetaGPT: Improper Neutralization of Special Elements used in a Command
CVE-2026-5974Apr 9, 2026FoundationAgentsEPSS 2.56%
A vulnerability was determined in FoundationAgents MetaGPT up to 0.8.1. The affected element is the function Bash.run in the library metagpt/tools/libs/terminal.py. This manipulation causes os command injection. The attack is possible to be carried out remotel
9.8 Critical severity
MetaGPT: Improper Neutralization of Special Elements used in a Command
CVE-2026-5973Apr 9, 2026FoundationAgentsEPSS 2.61%
A vulnerability was found in FoundationAgents MetaGPT up to 0.8.1. Impacted is the function get_mime_type of the file metagpt/utils/common.py. The manipulation results in os command injection. The attack can be executed remotely. The exploit has been made publ
9.8 Critical severity
MetaGPT: Improper Neutralization of Special Elements used in a Command
CVE-2026-5972Apr 9, 2026FoundationAgentsEPSS 2.66%
A vulnerability has been found in FoundationAgents MetaGPT up to 0.8.1. This issue affects the function Terminal.run_command in the library metagpt/tools/libs/terminal.py. The manipulation leads to os command injection. Remote exploitation of the attack is pos
9.8 Critical severity
A3300r Firmware: Improper Neutralization of Special Elements used in a Command
CVE-2026-31170Apr 9, 2026TOTOLINK
An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the stun-pass parameter to /cgi-bin/cstecgi.cgi.
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5854Apr 9, 2026TOTOLINKEPSS 16.9%
A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setWiFiEasyCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument merge results in os command in
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5853Apr 9, 2026TOTOLINKEPSS 13.7%
A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this vulnerability is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument addrPrefixLen lea
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5852Apr 9, 2026TOTOLINKEPSS 13.7%
A weakness has been identified in Totolink A7100RU 7.4cu.2313_b20191024. Affected is the function setIptvCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument igmpVer causes os command injection. The attack is pos
9.8 Critical severity
A7100RU: Improper Neutralization of Special Elements used in a Command
CVE-2026-5851Apr 9, 2026TOTOLINKEPSS 13.6%
A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument enable results in os command injection. The attac