CVE-2020-8974: In ZGR TPS200 NG 2.00 firmware version and 1.01 hardware version, the firmware upload process does not perform

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CRITICAL 10.0REMOTEMITIGATE

CVE-2020-8974 is a critical-severity flaw (CVSS 10.0) affecting zgr tps200 ng firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In ZGR TPS200 NG 2.00 firmware version and 1.01 hardware version, the firmware upload process does not perform any type of restriction. This allows an attacker to modify it and re-upload it via web with malicious modifications, rendering the device unusable.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-434
Published	2022-10-17
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: zigor

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-10-17 22:15 UTCPublished CVE record published
2026-06-17 03:27 UTCUpdated Record last modified

zigor zgr tps200 ng firmware MITIGATE

Affected: 2.00

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.00

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-8974?

zgr tps200 ng firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-8974 being exploited?

CVE-2020-8974 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-8974 affect?

CVE-2020-8974 affects zgr tps200 ng firmware. Severity is critical (CVSS 10.0). In ZGR TPS200 NG 2.00 firmware version and 1.01 hardware version, the firmware upload process does not perform any type of restriction. This allows an attacker to modify it and re-upload it via web with malicious modifications, rendering th

How urgent is CVE-2020-8974?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-8976 CRITICAL 9.6 MITIGATE The integrated server of the ZGR TPS200 NG on its 2.00 firmware version and 1.01 hardware version, allows a re
CVE-2020-8975 HIGH 7.5 MITIGATE ZGR TPS200 NG in its 2.00 firmware version and 1.01 hardware version, allows a remote attacker with access to
CVE-2020-8973 CRITICAL 9.3 MITIGATE ZGR TPS200 NG in its 2.00 firmware version and 1.01 hardware version, does not properly accept specially const

References

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