How severe is CVE-1999-0956?

CVE-1999-0956 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-1999-0956 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0956?

CVE-1999-0956 primarily affects Next Nextstep. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0956?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-1999-0956 published?

CVE-1999-0956 was published on 1997-09-19 and last updated on 2026-06-16.

CVE-1999-0956

CVE-1999-0956 is a high-severity vulnerability in Next Nextstep with a CVSS 2.0 base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Next Nextstep
Published: 1997-09-19
Last modified: 2026-06-16

Description

The NeXT NetInfo _writers property allows local users to gain root privileges or conduct a denial of service.

Frequently asked questions

What is CVE-1999-0956?: The NeXT NetInfo _writers property allows local users to gain root privileges or conduct a denial of service.
How severe is CVE-1999-0956?: CVE-1999-0956 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-1999-0956 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0956?: CVE-1999-0956 primarily affects Next Nextstep. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0956?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-1999-0956 published?: CVE-1999-0956 was published on 1997-09-19 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0956

Affected products (5)

cpe:2.3:o:next:nextstep:1.0:*:*:*:*:*:*:*
cpe:2.3:o:next:nextstep:1.0a:*:*:*:*:*:*:*
cpe:2.3:o:next:nextstep:2.0:*:*:*:*:*:*:*
cpe:2.3:o:next:nextstep:2.1:*:*:*:*:*:*:*
cpe:2.3:o:next:nextstep:3.0:*:*:*:*:*:*:*

More vulnerabilities in Next Nextstep

CVE-1999-0046 — Critical (CVSS 10.0): Buffer overflow of rlogin program using TERM environmental variable.
CVE-1999-0032 — High (CVSS 7.2): Buffer overflow in lpr, as used in BSD-based systems including Linux, allows local users to execute arbitrary code as…
CVE-1999-0078 — Low (CVSS 1.9): pcnfsd (aka rpc.pcnfsd) allows local users to change file permissions, or execute arbitrary commands through arguments…

All CVEs affecting Next Nextstep →