CVE-2018-7891: The Milestone XProtect Video Management Software (Corporate, Expert, Professional+, Express+, Essential+) 2016

Q: How do I fix CVE-2018-7891?

xprotect: upgrade to newer than 12.1a; siveillance vms: upgrade to 10.0a, 10.1a, 10.2b, 11.1a, 11.2a, 12.1a. Exact commands for each OS are on this page.

Q: Is CVE-2018-7891 being exploited?

CVE-2018-7891 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-7891 affect?

CVE-2018-7891 affects xprotect, siveillance vms. Severity is high (CVSS 8.1). The Milestone XProtect Video Management Software (Corporate, Expert, Professional+, Express+, Essential+) 2016 R1 (10.0.a) to 2018 R1 (12.1a) contains .NET Remoting endpoints that are vulnerable to deserialization attacks resulting in remot

Q: How urgent is CVE-2018-7891?

Priority 56/100. High severity; EPSS top 10%: very likely to be exploited; Remotely exploitable, no login, no user action

This month

HIGH 8.1REMOTEUPGRADEUPGRADE

CVE-2018-7891 is a high-severity flaw (CVSS 8.1) affecting xprotect, siveillance vms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Milestone XProtect Video Management Software (Corporate, Expert, Professional+, Express+, Essential+) 2016 R1 (10.0.a) to 2018 R1 (12.1a) contains .NET Remoting endpoints that are vulnerable to deserialization attacks resulting in remote code execution.

Why this priority

High severity
EPSS top 10%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	4.0% (top 10%)
CISA exploited list	No
Weakness	CWE-502
Published	2018-04-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: milestonesys · siemens

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

Am I affected?

Timeline

2018-04-30 15:29 UTCPublished CVE record published
2026-06-17 02:03 UTCUpdated Record last modified

milestonesys xprotect UPGRADE

Affected: >= 10.0.a and <= 12.1a

Fixed in: newer than 12.1a

Safe to downgrade to: a release before 10.0.a

1. Check installed version

apt-cache policy xprotect || rpm -q xprotect || xprotect --version

2. UPGRADE to newer than 12.1a (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xprotect

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xprotect

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 10.0.a (Debian / Ubuntu)

apt-cache madison xprotect sudo apt install xprotect=<VERSION_BEFORE_10.0.a> sudo apt-mark hold xprotect

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xprotect sudo dnf downgrade xprotect-<VERSION_BEFORE_10.0.a> sudo dnf versionlock add xprotect

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.

siemens siveillance vms UPGRADE

Affected: < 10.0a · < 10.1a · < 10.2b · < 11.1a · < 11.2a · < 12.1a

Fixed in: 10.0a, 10.1a, 10.2b, 11.1a, 11.2a, 12.1a

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy siveillance-vms || rpm -q siveillance-vms || siveillance-vms --version

2. UPGRADE to 10.0a (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade siveillance-vms

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade siveillance-vms

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2018-7891?

xprotect: upgrade to newer than 12.1a; siveillance vms: upgrade to 10.0a, 10.1a, 10.2b, 11.1a, 11.2a, 12.1a. Exact commands for each OS are on this page.

Is CVE-2018-7891 being exploited?

CVE-2018-7891 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-2018-7891 affect?

CVE-2018-7891 affects xprotect, siveillance vms. Severity is high (CVSS 8.1). The Milestone XProtect Video Management Software (Corporate, Expert, Professional+, Express+, Essential+) 2016 R1 (10.0.a) to 2018 R1 (12.1a) contains .NET Remoting endpoints that are vulnerable to deserialization attacks resulting in remot

How urgent is CVE-2018-7891?

Priority 56/100. High severity; EPSS top 10%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

Siemens vulnerabilities

References

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