CVE-1999-0073

CRITICAL

Telnet allows a remote client to specify environment variables including LD_LIBRARY_PATH, allowing an attacker to bypass the normal system libraries and gain root access.

Affects 3 products across 2 vendors.

CVSS 2.010.0
EPSS3.1%
Percentile88th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
◆ AI Analysis — automated analysis, not human-reviewed

This vulnerability was disclosed in 1995. A critical vulnerability affects Digital systems (CVE-1999-0073). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-1995-GLOBAL-307609-C • Model: rule-based-v1 • Confidence: MEDIUM

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Frequently Asked Questions
What is CVE-1999-0073?
This vulnerability was disclosed in 1995. A critical vulnerability affects Digital systems (CVE-1999-0073). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-1999-0073?
CVE-1999-0073 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 3.1%.
Is CVE-1999-0073 actively exploited?
No confirmed active exploitation of CVE-1999-0073 as of 2026-06-20.
How do I remediate CVE-1999-0073?
Priority: MEDIUM.
What systems are affected by CVE-1999-0073?
CVE-1999-0073 affects Digital Osf 1, Unix; Sgi Irix.
Vulnerability Details
CVE IDCVE-1999-0073
BSIDBS-1995-GLOBAL-307609-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published1995-10-13
Last Modified2026-06-16
ICS Relevance0%
SourceNVD
Official Description

Telnet allows a remote client to specify environment variables including LD_LIBRARY_PATH, allowing an attacker to bypass the normal system libraries and gain root access.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: Telnet allows a remote client to specify environment variables including LD_LIBRARY_PATH, allowing an attacker to bypass the normal system libraries and gain root access. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: LOW

Affected Products
VendorProductAffected Versions
Digital Osf 1 1.2 1.3 2.0 3.0 3.2
Digital Unix 3.2g 4.0
Sgi Irix 5.0 5.0.1 5.1 5.1.1 5.2 5.3
+5 more6.0 6.0.1 6.1 6.2 6.3
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 11334 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hasha627a9f1d1f2ab27b1fd8c81e13c655fd7f83b3ae454be412b7e94fabf04fa8e6997f7fa89cf527caf107ae6aeb06e5536a8cc52414417aaa15c5c1cae4e46c4
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