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CVE-2021-44564

25
FAUCET Score

CVE-2021-44564 is a high-severity vulnerability affecting specific sub-families of Kalkitech SYNC devices, including the SYNC2101 product. It allows an unauthenticated attacker with network access and knowledge of the device's IP address to download and upload modified configuration files due to an unsecured communication channel used by the Easyconnect administration tool. This vulnerability carries a CVSS score of 8.1 (HIGH), indicating a complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.15.3CPE matchmatch criteria
cpe:2.3:o:kalkitech:sync241-m1_firmware:*:*:*:*:*:*:*:*
<= 4.15.3CPE matchmatch criteria
cpe:2.3:o:kalkitech:sync241-m2_firmware:*:*:*:*:*:*:*:*
<= 4.15.3CPE matchmatch criteria
cpe:2.3:o:kalkitech:sync241-m4_firmware:*:*:*:*:*:*:*:*
<= 4.15.3CPE matchmatch criteria
cpe:2.3:o:kalkitech:sync261-m1_firmware:*:*:*:*:*:*:*:*
<= 4.15.3CPE matchmatch criteria
cpe:2.3:o:kalkitech:sync2000-m1_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.92%
Probability of exploitation in next 30 days
EPSS Percentile
56.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0092 is in the 23rd percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

kalkitech.com / wp-content/uploads/CYB_33631_Advisory.pdf
Vendor Advisory
kalkitech.com / cybersecurity
Vendor Advisory