CVE-2026-121817 PUBLISHED

About Time Technologies｜Herowatch Go Server - Insecure Direct Object Reference

Assigner: twcert
Reserved: 04.11.2026 Published: 04.11.2026 Updated: 04.11.2026

Herowatch Go Server developed by About Time Technologies has a Insecure Direct Object Reference vulnerability. Authenticated remote attackers can modify specific parameters to access or operate other users' data and functions.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	About Time Technologies
Product	Herowatch Go Server
Versions	Default: unaffected Version all is affected

Solutions

The product is no longer maintained. Users are advised to replace it with a supported device.

References

Problem Types

CWE-639 Authorization Bypass Through User-Controlled Key CWE