Vulnerability · Published Nov 4, 2026 · Assigned by twcert
CVE-2026-121817About Time Technologies｜Herowatch Go Server - Insecure Direct Object Reference
High 7.5
In plain English
A high-severity authorization bypass via user-controlled key in Herowatch Go Server from About Time Technologies. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 61.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| About Time Technologies | Herowatch Go Server | all |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://www.twcert.org.tw/en/cp-139-11364-0dce6-2.html third-party-advisory
- https://www.twcert.org.tw/tw/cp-132-11366-d92ac-1.html third-party-advisory