CVE-2018-21099

Authenticated command execution via undisclosed input

Published Apr 27, 2020 · Updated Aug 5, 2024

OS command injection in NETGEAR R7800 firmware before 1.0.2.60 allows remote authenticated users to execute commands over the local network. NETGEAR has not published the affected handler, input parameter, or unsafe operation that passes attacker-controlled data to the operating-system shell. Access requires an authenticated session and adjacent-network reachability; successful exploitation can alter data and disrupt the router.

CVSS severity8.0
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

OS command injection in NETGEAR R7800 firmware before 1.0.2.60 allows remote authenticated users to execute commands over the local network. NETGEAR has not published the affected handler, input parameter, or unsafe operation that passes attacker-controlled data to the operating-system shell. Access requires an authenticated session and adjacent-network reachability; successful exploitation can alter data and disrupt the router.

The record

CVE
CVE-2018-21099
Published
Apr 27, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 vectoradjacent
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.2NIST NVDAV:A/AC:L/Au:S/C:P/I:P/A:P
7.1NETGEARCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
8.0NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.6MITRECVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo