CVE-2021-31926Public exploitNetwork attack vector

Authenticated firewall changes via missing permission metadata

Published Apr 30, 2021 · Updated Aug 3, 2024

Incorrect authorization in CubeCoders AMP 2.1.x before 2.1.1.2 allows remote authenticated users to open local firewall ports. The ADS port-management API endpoint lacks permission metadata, so it accepts crafted HTTP(S) requests from logged-in accounts without network-configuration rights. An ADS login is required, and the exposed operation adds custom firewall rules but cannot open ports below 1024.

CVSS severity6.5
Medium
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in CubeCoders AMP 2.1.x before 2.1.1.2 allows remote authenticated users to open local firewall ports. The ADS port-management API endpoint lacks permission metadata, so it accepts crafted HTTP(S) requests from logged-in accounts without network-configuration rights. An ADS login is required, and the exposed operation adds custom firewall rules but cannot open ports below 1024.

The record

CVE
CVE-2021-31926
Published
Apr 30, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-863, T1562.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 30, 2021CVE 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

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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

4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:P/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1562.004Impair Defenses: Disable or Modify System Firewall

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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