CVE intelligence and bounded remediation

CVE-2021-44564 — Kalkitech Sync241-M1 Firmware security vulnerability

High CVSS 8.1

A security vulnerability originally reported in the SYNC2101 product, and applicable to specific sub-families of SYNC devices, allows an attacker to download the configuration file used in the device and apply a modified configuration file back to the device. The attack requires network access to the SYNC device and knowledge of its IP address. The attack exploits the unsecured communication channel used between the administration tool Easyconnect and the SYNC device (in the affected family of SYNC products).

Severity
High
CVSS
8.1 (3.1)
Published
2022-01-06
CISA KEV
Not currently listed
Ecosystem
operating-system

Affected products

  • kalkitech / sync241-m1_firmware
  • kalkitech / sync241-m2_firmware
  • kalkitech / sync241-m4_firmware
  • kalkitech / sync261-m1_firmware
  • kalkitech / sync2000-m1_firmware
  • kalkitech / sync2000-m2_firmware

Showing 6 representative product identities from 20 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

General vulnerability remediation

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Confirm the affected component, deployment paths, reachable interfaces, and enabled features from inventories and configuration, without probing production destructively.
  • Compare the advisory's affected conditions with the repository lockfiles, build manifests, artifacts, and runtime inventory.
  • Identify data sensitivity, trust boundaries, and privilege level for every confirmed affected deployment.

Remediate safely

  • Apply a vendor-supported fix or remove the affected component or feature; record the selected change and its source in the repository.
  • Update direct and transitive dependency locks, generated artifacts, deployment manifests, and asset inventories together.
  • Add a regression test for the documented unsafe condition using inert inputs and preserve rollback instructions.

Authoritative sources

Complete CVE record and remediation plan

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