CVE-2020-12030
No exploitation reported by the sources we read.
- Published2021-09-29
- WeaknessCWE-284
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « 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
There is a flaw in the code used to configure the internal gateway firewall when the gateway's VLAN feature is enabled. If a user enables the VLAN setting, the internal gateway firewall becomes disabled resulting in exposure of all ports used by the gateway.
Timeline
dates in UTC- 2021-09-2920:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-12030?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-12030?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.x | ≥ 4.6.43, ≤ 4.7.84 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.x | ≥ 4.6.43, ≤ 4.7.84 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.x | ≥ 4.6.43, ≤ 4.7.84 | 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
Emerson WirelessHART Gateway
Wireless 1420 Gateway: revisions 4.6.43 to 4.7.84 · Wireless 1552WU Gateway: revisions 4.6.43 to 4.7.84 · Wireless 1410 Gateway: revisions 4.6.43 to 4.7.84
Fix
- Mitigation from the vendor CISA ICSA-20-135-02 · 3 productsEmerson recommends end users update the firmware on VLAN-enabled Version 4 gateways as soon as possible.
- Mitigation from the vendor CISA ICSA-20-135-02 · 3 productsIf the VLAN feature is not enabled, no immediate action is necessary. Please see Emerson's cybersecurity notification alert number EMR.RMT20001-1 for more information.
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CNACVSS 3.110read 2026-10-23
- NVDCVSS 3.110read 2026-10-23
- NVDCVSS 2.06.8read 2026-10-23
- CNAweakness (CWE)CWE-284read 2026-10-23
- FIRST EPSSEPSS score1.1 %2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- 2021-09-29
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-12030?
Is CVE-2020-12030 actively exploited?
What is the CVSS score for CVE-2020-12030?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.