How severe is CVE-1999-0016?

No CVSS score has been assigned to CVE-1999-0016 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-1999-0016?

Affected package information for CVE-1999-0016 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-1999-0016?

No fixed version has been published for CVE-1999-0016 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-1999-0016 actively exploited in the wild?

Yes. There are 5 known exploit references for CVE-1999-0016, including 5 documented proof-of-concept exploits on Exploit-DB. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-1999-0016?

CVE-1999-0016 has an EPSS (Exploit Prediction Scoring System) score of 95.7%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Which products and versions are affected by CVE-1999-0016?

CVE-1999-0016 affects cisco ios (1 version, e.g. 7000); gnu inet (1 version, e.g. 5.01); hp hp-ux (14 versions, e.g. 9.00, 9.01, 9.03…); microsoft windows 95, and 4 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-1999-0016 published, and has it been updated?

CVE-1999-0016 was published on December 1, 1997 and was last updated on April 16, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-1999-0016

Land IP denial of service.

Published

Dec 1, 1997

Updated

Apr 16, 2026

Affected

0 pkgs

Patched

None yet

Exploits

5 known

EPSS Exploitation Probability

via FIRST.org ↗

95.7%probability of exploitation in next 30 days

Very High Risk100th percentile+14.68%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

Land IP denial of service.

Affected Products

8 products · 23 configurations

ioscisco

1 version

7000

Application

inetgnu

1 version

5.01

hp-uxhp

14 versions

9.009.019.039.049.059.0710.0010.0110.1010.1610.2010.24

windows 95microsoft

all

windows ntmicrosoft

1 version

4.0

Application

winsockmicrosoft

1 version

2.0

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-20814doswindows✓ Verified

FreeBSD 2.x / HP-UX 9/10/11 / Kernel 2.0.3 / Windows NT 4.0/Server 2003 / NetBSD 1 - 'land.c' loopback Denial of Service (5)

by Dejan Levaja · Nov 20, 1997

Exploit-DB Source

EDB-20810dosmultiple✓ Verified

FreeBSD 2.x / HP-UX 9/10/11 / Kernel 2.0.3 / Windows NT 4.0/Server 2003 / NetBSD 1 - 'land.c' loopback Denial of Service (1)

by m3lt · Nov 20, 1997

Exploit-DB Source

EDB-20812doswindows✓ Verified

FreeBSD 2.x / HP-UX 9/10/11 / Kernel 2.0.3 / Windows NT 4.0/Server 2003 / NetBSD 1 - 'land.c' loopback Denial of Service (3)

by m3lt · Nov 20, 1997

Exploit-DB Source

EDB-20813dosmultiple✓ Verified

FreeBSD 2.x / HP-UX 9/10/11 / Kernel 2.0.3 / Windows NT 4.0/Server 2003 / NetBSD 1 - 'land.c' loopback Denial of Service (4)

by MondoMan · Nov 20, 1997

Exploit-DB Source

EDB-20811dosmultiple✓ Verified

FreeBSD 2.x / HP-UX 9/10/11 / Kernel 2.0.3 / Windows NT 4.0/Server 2003 / NetBSD 1 - 'land.c' loopback Denial of Service (2)

by Konrad Malewski · Nov 20, 1997

Exploit-DB Source

Frequently Asked Questions

Land IP denial of service.

O3 Security · Impact-Aware SCA

Is CVE-1999-0016 in your stack?

O3 detects CVE-1999-0016 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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