CVE-2022-26210Public exploitNetwork attack vector

Remote command execution via unsanitized firmware filename

Published Mar 15, 2022 · Updated Aug 3, 2024

OS command injection in TOTOLINK A830R, A3100R, A950RG, A800R, A3000RU, and A810R firmware allows remote attackers to execute commands. The setUpgradeFW function inserts the request-controlled FileName value into a shell command and passes the resulting string to system without neutralizing command separators. Network access to the router CGI endpoint requires no privileges; injected commands run in the firmware process context and can read, alter, or interrupt the device.

CVSS severity9.8
Critical
EPSS probability5.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in TOTOLINK A830R, A3100R, A950RG, A800R, A3000RU, and A810R firmware allows remote attackers to execute commands. The setUpgradeFW function inserts the request-controlled FileName value into a shell command and passes the resulting string to system without neutralizing command separators. Network access to the router CGI endpoint requires no privileges; injected commands run in the firmware process context and can read, alter, or interrupt the device.

The record

CVE
CVE-2022-26210
Published
Mar 15, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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