No exploitation reportedFix available

CVE-2021-37200

Q: Is CVE-2021-37200 actively exploited?

Active exploitation of CVE-2021-37200 has not been confirmed. Its EPSS score was 37.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-37200?

CVE-2021-37200 has a CVSS v3 base score of 7.7 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

No exploitation reported by the sources we read.

Published2021-09-14
Fixed in1.0
WeaknessCWE-22

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

A vulnerability has been identified in SINEC NMS (All versions < V1.0 SP1). An attacker with access to the webserver of an affected system could download arbitrary files from the underlying filesystem by sending a specially crafted HTTP request.

Timeline

dates in UTC

2021-09-1411:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 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-2021-37200?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-37200?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens sinec network management system

Branch	Affected	Fixed in	Source
1.0	< 1.0	1.0	NVD
1.0	= 1.0	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-21-257-14 CISA1 known affected
Siemens SINEC NMS
SINEC NMS

Full record on NVD

Fix

Update Siemens sinec network management system to 1.0
Vendor fix CISA ICSA-21-257-14 · 1 productUpdate to V1.0 SP1 or later version
Workaround from the vendor CISA ICSA-21-257-14 · 1 productDo not access links from untrusted sources

Advisories and patches

cert-portal.siemens.comPatch · Vendor Advisory

Detection

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

Sources

NVDCVSS 3.17.7read 2026-10-23
NVDCVSS 2.04read 2026-10-23
CNAweakness (CWE)CWE-22read 2026-10-23
FIRST EPSSEPSS score37.4 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Published: 2021-09-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-37200?

Is CVE-2021-37200 actively exploited?

Active exploitation of CVE-2021-37200 has not been confirmed. Its EPSS score was 37.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-37200?

CVE-2021-37200 has a CVSS v3 base score of 7.7 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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