CVE-2020-35576Public exploitNetwork attack vector

Root command execution via traceroute host injection

Published Jan 25, 2021 · Updated Aug 4, 2024

OS command injection in TP-Link TL-WR841N V13 (JP) before 201216 allows remote authenticated users to execute root commands via traceroute. The traceroute handler passes the host field into a shell command without neutralizing double quotes or backticks, enabling command substitution. Authenticated access to web management is required; resulting root command execution can read or alter data and interrupt or permanently disable the router.

CVSS severity7.2
High
EPSS probability42.29%
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 TP-Link TL-WR841N V13 (JP) before 201216 allows remote authenticated users to execute root commands via traceroute. The traceroute handler passes the host field into a shell command without neutralizing double quotes or backticks, enabling command substitution. Authenticated access to web management is required; resulting root command execution can read or alter data and interrupt or permanently disable the router.

The record

CVE
CVE-2020-35576
Published
Jan 25, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 25, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.5JPCERT/CCAV:N/AC:M/Au:S/C:C/I:C/A:C

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
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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