CVE-2005-1558: The web module in Neteyes Nexusway allows remote attackers to bypass authentication and gain administrator pri

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HIGH 7.5DOWNGRADE

CVE-2005-1558 is a high-severity flaw (CVSS 7.5) affecting nexusway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The web module in Neteyes Nexusway allows remote attackers to bypass authentication and gain administrator privileges by setting the cyclone500_auth cookie.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Published	2005-05-11
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: neteyes

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-05-11 04:00 UTCPublished CVE record published
2026-06-16 22:13 UTCUpdated Record last modified

neteyes nexusway DOWNGRADE

Affected: 805

Fixed in: no fixed release known

Safe to downgrade to: a release before 805

1. Check installed version

apt-cache policy nexusway || rpm -q nexusway || nexusway --version

2. No fixed release: DOWNGRADE to a release before 805 (Debian / Ubuntu)

apt-cache madison nexusway sudo apt install nexusway=<VERSION_BEFORE_805> sudo apt-mark hold nexusway

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nexusway sudo dnf downgrade nexusway-<VERSION_BEFORE_805> sudo dnf versionlock add nexusway

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2005-1558?

nexusway: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-1558 being exploited?

CVE-2005-1558 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-2005-1558 affect?

CVE-2005-1558 affects nexusway. Severity is high (CVSS 7.5). The web module in Neteyes Nexusway allows remote attackers to bypass authentication and gain administrator privileges by setting the cyclone500_auth cookie.

How urgent is CVE-2005-1558?

Priority 51/100. High severity; Public exploit reference

Related CVEs

CVE-2005-1560 HIGH 10.0 DOWNGRADE The SSH module in Neteyes Nexusway allows remote attackers to execute arbitrary commands via shell metacharact

References

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