No exploitation reportedFix available

CVE-2018-7891

Q: Is CVE-2018-7891 actively exploited?

Active exploitation of CVE-2018-7891 has not been confirmed. Its EPSS score was 4.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-7891?

CVE-2018-7891 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2018-04-30
Fixed in12.1a · 11.2a · 11.1a · 10.2b · 10.1a · 10.0a
WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2018-04-3015:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-7891?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-7891?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens siveillance vms

Branch	Affected	Fixed in	Source
12.1	< 12.1a	12.1a	NVD
11.2	< 11.2a	11.2a	NVD
11.1	< 11.1a	11.1a	NVD
10.2	< 10.2b	10.2b	NVD
10.1	< 10.1a	10.1a	NVD
10.0	< 10.0a	10.0a	NVD

Milestonesys xprotect

Branch	Affected	Fixed in	Source
12.1	≥ 10.0.a, ≤ 12.1a	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-18-128-02 CISA6 known affected
ICSA-18-128-02 Siemens Siveillance VMS (Update A)
Siveillance VMS 2016 R1 and prior · Siveillance VMS 2016 R2 · Siveillance VMS 2016 R3 · +3 more

Full record on NVD

Fix

Update Siemens siveillance vms to 12.1a · 11.2a · 11.1a · 10.2b · 10.1a · 10.0a
Mitigation from the vendor CISA ICSA-18-128-02 · 1 productUpdate to V10.0a - Download: Obtain the update via your local Siemens representative
Mitigation from the vendor CISA ICSA-18-128-02 · 1 productUpdate to V10.1a - Download: Obtain the update via your local Siemens representative
Mitigation from the vendor CISA ICSA-18-128-02 · 1 productUpdate to V10.2b - Download: Obtain the update via your local Siemens representative
Mitigation from the vendor CISA ICSA-18-128-02 · 1 productUpdate to V11.1a - Download: Obtain the update via your local Siemens representative
Mitigation from the vendor CISA ICSA-18-128-02 · 1 productUpdate to V11.2a - Download: Obtain the update via your local Siemens representative
Mitigation from the vendor CISA ICSA-18-128-02 · 1 productUpdate to V12.1a - Download: Obtain the update via your local Siemens representative

Advisories and patches

cert-portal.siemens.comMitigation
supportcommunity.milestonesys.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.08.1read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
NVDweakness (CWE)CWE-502read 2026-10-23
FIRST EPSSEPSS score4.0 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2018-04-30
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-7891?

Is CVE-2018-7891 actively exploited?

Active exploitation of CVE-2018-7891 has not been confirmed. Its EPSS score was 4.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-7891?

CVE-2018-7891 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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