CVE-1999-1021: n/a vulnerability

CVE-1999-1021: NFS on SunOS 4.1 through 4.1.2 ignores the high order 16 bits in a 32 bit UID, which allows a local user to...

NFS on SunOS 4.1 through 4.1.2 ignores the high order 16 bits in a 32 bit UID, which allows a local user to gain root access if the lower 16 bits are set to 0, as fixed by the NFS jumbo patch upgrade.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 1, 2024, 16:55 UTC (UTC+00:00)

Security readout for executives and security teams

This is a legacy SunOS NFS privilege issue. On SunOS 4.1 through 4.1.2, NFS could mishandle 32-bit user IDs and treat some local users as root. Business urgency is mainly for organizations still running or emulating very old SunOS systems. Exposure appears limited to legacy SunOS 4.1, 4.1.1, and 4.1.2 systems using NFS. Modern fleets are unlikely to be affected unless they retain historical systems, lab hosts, or archived operational environments. Prioritize only if the organization still operates legacy SunOS/NFS systems. For most modern environments, this is a legacy-risk cleanup item rather than an emergency incident response trigger. Mitigation focus: Inventory any SunOS 4.1 through 4.1.2 systems.; Confirm whether NFS is enabled on those systems.; Apply the referenced NFS jumbo patch upgrade where applicable..

Prepared: Jul 1, 2026, 08:27 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 9, 2002, 05:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
nfs-uid(82)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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