CVE-2021-27424
No exploitation reported by the sources we read.
- Published2022-03-23
- Fixed in8.10
- WeaknessCWE-200 · CWE-668
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
GE UR firmware versions prior to version 8.1x shares MODBUS memory map as part of the communications guide. GE was made aware a “Last-key pressed” MODBUS register can be used to gain unauthorized information.
Timeline
dates in UTC- 2022-03-2320:15CVE 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-2021-27424?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-27424?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 |
|---|---|---|---|
| 8.10 | < 8.10 | 8.10 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.10 | < 8.10 | 8.10 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 8.10 | < 8.10 | 8.10 | NVD |
16 more products in the sources.
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
GE UR Family (Update A)
GE Veronva UR B30: <8.10 · GE Veronva UR B90: <8.10 · GE Veronva UR C30: <8.10 · +16 more
Fix
- Update Ge multilin b30 firmware to 8.10
- Vendor fix CISA ICSA-21-075-02 · 19 productsGE strongly recommends users with impacted firmware versions update their UR devices to UR firmware Version 8.10 or greater to resolve these vulnerabilities. GE provides additional mitigations and information about these vulnerabilities in GE Publication Number: GES-2021-004 at https://www.gegridso…
- Mitigation from the vendor CISA ICSA-21-075-02 · 19 productsGE recommends protecting UR IED by using network defense-in-depth practices. This includes, but is not limited to, placing UR IED inside the control system network security perimeter, and having access controls, monitoring (such as an Intrusion Detection System), and other mitigating technologies i…
- Mitigation from the vendor CISA ICSA-21-075-02 · 19 productsGE recommends users refer to the UR Deployment guide for secure configuration of UR IED and system.
Advisories and patches
- www.cisa.govMitigation
- www.gegridsolutions.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Published
- 2022-03-23
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-27424?
Is CVE-2021-27424 actively exploited?
What is the CVSS score for CVE-2021-27424?
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