CVE-2020-8636Network attack vector

Unauthenticated code execution via nmap_options injection

Published Feb 6, 2020 · Updated Aug 4, 2024

Command injection in OpServices OpMon 9.3.2 allows remote attackers to execute arbitrary code through an unauthenticated web request. The web interface passes attacker-controlled nmap_options input into an Nmap command without authentication. Network access to the interface is sufficient, and injected commands execute with the web server account privileges.

CVSS severity9.8
Critical
EPSS probability4.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in OpServices OpMon 9.3.2 allows remote attackers to execute arbitrary code through an unauthenticated web request. The web interface passes attacker-controlled nmap_options input into an Nmap command without authentication. Network access to the interface is sufficient, and injected commands execute with the web server account privileges.

The record

CVE
CVE-2020-8636
Published
Feb 6, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
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

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Your stack

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