CVE-2018-18066

Name: CVE-2018-18066
Creator: NVD / NIST
Published: 2018-10-08T18:29:00.52+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.30%

Last modified Jun 17, 2026

CVE-2018-18066 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. snmp_oid_compare in snmplib/snmp_api.c in Net-SNMP before 5.8 has a NULL Pointer Exception bug that can be used by an unauthenticated attacker to remotely cause the instance to crash via a crafted UDP packet, resulting in Denial of Service.. EPSS estimates a 4.30% chance of exploitation in the next 30 days.

Description

snmp_oid_compare in snmplib/snmp_api.c in Net-SNMP before 5.8 has a NULL Pointer Exception bug that can be used by an unauthenticated attacker to remotely cause the instance to crash via a crafted UDP packet, resulting in Denial of Service.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

4.30%

89.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Net-Snmp	Net-Snmp	< 5.8
Netapp	Cloud Backup	All versions
Netapp	Hyper Converged Infrastructure	All versions
Netapp	Storagegrid Webscale	All versions
Netapp	Data Ontap	All versions
Netapp	E-Series Santricity Os Controller	>= 11.0, <= 11.5
Netapp	Solidfire Element Os	All versions

References

https://dumpco.re/blog/net-snmp-5.7.3-remote-dosExploit, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20181107-0001/Third Party Advisory
https://sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/Patch, Third Party Advisory
https://sourceforge.net/p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791/Patch, Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://dumpco.re/blog/net-snmp-5.7.3-remote-dosExploit, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20181107-0001/Third Party Advisory
https://sourceforge.net/p/net-snmp/code/ci/7ffb8e25a0db851953155de91f0170e9bf8c457d/Patch, Third Party Advisory
https://sourceforge.net/p/net-snmp/code/ci/f23bcd3ac6ddee5d0a48f9703007ccc738914791/Patch, Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html

Timeline

Published: Oct 8, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18066?

How severe is CVE-2018-18066?

CVE-2018-18066 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.30% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18066?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-18066?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST