CVE-2020-8797Public exploitNetwork attack vector

Root command execution via unsanitized exec call

Published Apr 23, 2020 · Updated Aug 4, 2024

OS command injection in Juplink RX4-1500 firmware 1.0.3 allows remote authenticated users to gain root access from the local network. The undocumented telnetd service passes attacker-controlled command-line input to an exec call without sanitizing shell metacharacters. Exploitation requires telnetd to be enabled and valid administrator credentials, after which injected commands execute with root privileges.

CVSS severity6.7
Medium
EPSS probability0.93%
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 Juplink RX4-1500 firmware 1.0.3 allows remote authenticated users to gain root access from the local network. The undocumented telnetd service passes attacker-controlled command-line input to an exec call without sanitizing shell metacharacters. Exploitation requires telnetd to be enabled and valid administrator credentials, after which injected commands execute with root privileges.

The record

CVE
CVE-2020-8797
Published
Apr 23, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 23, 2020CVE 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.9NIST NVDAV:L/AC:M/Au:N/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
Privilegesadmin
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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