CVE-2018-1000116: NET-SNMP version 5.7.2 contains a heap corruption vulnerability in the UDP protocol handler that can result in

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CRITICAL 9.8REMOTEWATCHLISTDOWNGRADEMITIGATE

CVE-2018-1000116 is a critical-severity flaw (CVSS 9.8) affecting net-snmp, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NET-SNMP version 5.7.2 contains a heap corruption vulnerability in the UDP protocol handler that can result in command execution.

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	6.3% (top 6%)
CISA exploited list	No
Weakness	CWE-787
Published	2018-03-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · net-snmp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-03-07 14:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

net-snmp net-snmp DOWNGRADE

Affected: 5.7.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.7.2

1. Check installed version

apt-cache policy net-snmp || rpm -q net-snmp || net-snmp --version

2. No fixed release: DOWNGRADE to a release before 5.7.2 (Debian / Ubuntu)

apt-cache madison net-snmp sudo apt install net-snmp=<VERSION_BEFORE_5.7.2> sudo apt-mark hold net-snmp

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list net-snmp sudo dnf downgrade net-snmp-<VERSION_BEFORE_5.7.2> sudo dnf versionlock add net-snmp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

debian debian linux MITIGATE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · shotcut · FIXED · 26.10.30-1.fc46 · FEDORA-2026-7787c7fc2d · source

sudo dnf upgrade --advisory=FEDORA-2026-7787c7fc2d

Debian 12 · net-snmp · FIXED · 5.7.3+dfsg-1.1

sudo apt update && sudo apt install --only-upgrade net-snmp dpkg --compare-versions "$(dpkg-query -W -f='${Version}' net-snmp)" ge "5.7.3+dfsg-1.1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · net-snmp · FIXED · 5.7.3+dfsg-1.1

sudo apt update && sudo apt install --only-upgrade net-snmp dpkg --compare-versions "$(dpkg-query -W -f='${Version}' net-snmp)" ge "5.7.3+dfsg-1.1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 6 · net-snmp · FIXED · net-snmp-5.5-54.el6_7.1

sudo dnf upgrade --advisory=RHSA-2015:1636 rpm -q net-snmp

RHEL 7 · net-snmp · FIXED · net-snmp-5.7.2-20.ael7b_1.1

sudo dnf upgrade --advisory=RHSA-2015:1636 rpm -q net-snmp

RHEL 5 · net-snmp · DEFERRED

RHEL 8 · net-snmp · NOT AFFECTED

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-1000116?

net-snmp: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-1000116 being exploited?

CVE-2018-1000116 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-1000116 affect?

CVE-2018-1000116 affects net-snmp, debian linux. Severity is critical (CVSS 9.8). NET-SNMP version 5.7.2 contains a heap corruption vulnerability in the UDP protocol handler that can result in command execution.

How urgent is CVE-2018-1000116?

Priority 73/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

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References

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