CVE-2024-1039: Gessler GmbH WEB-MASTER has a restoration account that uses weak hard coded credentials and if exploited could

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CRITICAL 9.8REMOTEMITIGATE

CVE-2024-1039 is a critical-severity flaw (CVSS 9.8) affecting web-master firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Gessler GmbH WEB-MASTER has a restoration account that uses weak hard coded credentials and if exploited could allow an attacker control over the web management of the device.

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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 46%)
CISA exploited list	No
Weakness	CWE-798, CWE-287
Published	2024-02-01
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: gesslergmbh

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

Am I affected?

Timeline

2024-02-01 22:15 UTCPublished CVE record published
2026-06-17 07:03 UTCUpdated Record last modified

gesslergmbh web-master firmware MITIGATE

Affected: 7.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.9

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-2024-1039?

web-master firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-1039 being exploited?

CVE-2024-1039 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-2024-1039 affect?

CVE-2024-1039 affects web-master firmware. Severity is critical (CVSS 9.8). Gessler GmbH WEB-MASTER has a restoration account that uses weak hard coded credentials and if exploited could allow an attacker control over the web management of the device.

How urgent is CVE-2024-1039?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-1040 MEDIUM 4.4 MITIGATE Gessler GmbH WEB-MASTER user account is stored using a weak hashing algorithm

References

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