CVE-2020-8973

Unauthenticated parameter changes via crafted web requests

Published Oct 17, 2022 · Updated May 13, 2025

Improper access control in Zigor ZGR TPS 200 NG firmware 2.00 allows remote attackers to change device parameters via crafted web requests. INCIBE has not disclosed the affected request fields or web-handler logic, but reports that the integrated web server processes crafted requests without requiring registration. Access to the asset's network is sufficient, with no account or user interaction required; successful requests allow operation and alteration of several device parameters.

CVSS severity9.3
Critical
EPSS probability0.45%
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

Improper access control in Zigor ZGR TPS 200 NG firmware 2.00 allows remote attackers to change device parameters via crafted web requests. INCIBE has not disclosed the affected request fields or web-handler logic, but reports that the integrated web server processes crafted requests without requiring registration. Access to the asset's network is sufficient, with no account or user interaction required; successful requests allow operation and alteration of several device parameters.

The record

CVE
CVE-2020-8973
Published
Oct 17, 2022
Updated
May 13, 2025
Vendor
Zigor
Product
ZGR TPS 200 NG
Classifications
CWE-284, T0836
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 17, 2022CVE publishedPublication date reported by the CVE source.
  2. May 13, 2025Record 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.01 hardware version 1.01
  2. Affected versionversion=2.00 firmware version 2.00

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Zigor · ZGR TPS 200 NGversion=1.01 hardware version 1.01; version=2.00 firmware version 2.00

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
9.3INCIBECVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T0836Modify Parameter

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