CVE-2004-2539: Unknown vulnerability in Network Appliance NetCache 5.2 and Data ONTAP 6.0 allows remote attackers to cause a

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HIGH 7.8DOWNGRADEMITIGATE

CVE-2004-2539 is a high-severity flaw (CVSS 7.8) affecting data ontap, netcache. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unknown vulnerability in Network Appliance NetCache 5.2 and Data ONTAP 6.0 allows remote attackers to cause a denial of service (panic and reboot) and possibly other impacts via unknown attack vectors, possibly related to unspecified worms, as identified by bug ID

Why this priority

High severity

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

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: network appliance

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

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:09 UTCUpdated Record last modified

network appliance data ontap DOWNGRADE

Affected: 6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

1. Check installed version

apt-cache policy data-ontap || rpm -q data-ontap || data-ontap --version

2. No fixed release: DOWNGRADE to a release before 6.0 (Debian / Ubuntu)

apt-cache madison data-ontap sudo apt install data-ontap=<VERSION_BEFORE_6.0> sudo apt-mark hold data-ontap

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

dnf --showduplicates list data-ontap sudo dnf downgrade data-ontap-<VERSION_BEFORE_6.0> sudo dnf versionlock add data-ontap

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.

network appliance netcache MITIGATE

Affected: 5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

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-2004-2539?

data ontap: downgrade or apply the listed mitigation; netcache: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-2539 being exploited?

CVE-2004-2539 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-2004-2539 affect?

CVE-2004-2539 affects data ontap, netcache. Severity is high (CVSS 7.8). Unknown vulnerability in Network Appliance NetCache 5.2 and Data ONTAP 6.0 allows remote attackers to cause a denial of service (panic and reboot) and possibly other impacts via unknown attack vectors, possibly related to unspecified worms,

How urgent is CVE-2004-2539?

Priority 47/100. High severity

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References

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