CVE-1999-1534: Buffer overflow in (1) nlservd and (2) rnavc in Knox Software Arkeia backup product allows local users to obta

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HIGH 7.2DOWNGRADE

CVE-1999-1534 is a high-severity flaw (CVSS 7.2) affecting arkeia. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer overflow in (1) nlservd and (2) rnavc in Knox Software Arkeia backup product allows local users to obtain root access via a long HOME environmental variable.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Published	1999-09-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: knox software

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

Am I affected?

Timeline

1999-09-23 04:00 UTCPublished CVE record published
2026-06-16 21:50 UTCUpdated Record last modified

knox software arkeia DOWNGRADE

Affected: 4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.0 (Debian / Ubuntu)

apt-cache madison arkeia sudo apt install arkeia=<VERSION_BEFORE_4.0> sudo apt-mark hold arkeia

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

dnf --showduplicates list arkeia sudo dnf downgrade arkeia-<VERSION_BEFORE_4.0> sudo dnf versionlock add arkeia

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Knox Arkeia 4.0 Backup - Local Overflow

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-1999-1534?

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

Is CVE-1999-1534 being exploited?

CVE-1999-1534 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-1999-1534 affect?

CVE-1999-1534 affects arkeia. Severity is high (CVSS 7.2). Buffer overflow in (1) nlservd and (2) rnavc in Knox Software Arkeia backup product allows local users to obtain root access via a long HOME environmental variable.

How urgent is CVE-1999-1534?

Priority 46/100. High severity; Public exploit reference

Related CVEs

CVE-2001-0988 HIGH 7.2 UPGRADE Arkeia backup server 4.2.8-2 and earlier creates its database files with world-writable permissions, which cou
CVE-2001-0968 HIGH 10.0 DOWNGRADE Knox Arkeia server 4.2, and possibly other versions, installs its root user with a null password by default, w
CVE-2001-0967 CRITICAL 9.8 DOWNGRADE Knox Arkeia server 4.2, and possibly other versions, uses a constant salt when encrypting passwords using the
CVE-1999-0788 MEDIUM 5.0 DOWNGRADE Arkiea nlservd allows remote attackers to conduct a denial of service.

References

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