Missing authentication in Herowatch Mini exposes ADB shell
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
Herowatch Mini from About Time Technologies, in all versions, has missing authentication (CWE-306) on its ADB service. An unauthenticated remote attacker can connect to the device's ADB service and obtain an ADB shell, which gives access to device resources and related operations.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
Description from the CNA
Herowatch Mini developed by About Time Technologies has a Missing Authentication vulnerability. Unauthenticated remote attackers can connect to the affected device's ADB service and obtain an ADB shell, thereby accessing device resources or performing related operations.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| About Time Technologies | Herowatch Mini | all | — | No fix listed | CNA |
- Herowatch Mini VendorAbout Time Technologies Affected all Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Herowatch Mini.
Written with Claude Haiku 5.5 from the sources below · 2026-11-04
Timeline
- 2026-11-04 Threatist record created from CVE-2026-121816
- 2026-11-04 Affected versions changed · CNA
- 2026-11-04 Alias added: GHSA-g88g-cww8-g52p
- 2026-11-04 CISA SSVC decision points changed
- 2026-11-04 Priority changed: MEDIUM → LOW
- 2026-11-05 Priority changed: LOW → MEDIUM
References
More About Time Technologies vulnerabilities
- TI-2026-84975 Public test signing key in Herowatch Go enables privilege escalation CVSS 4.0HIGH 8.5
- TI-2026-84974 Insecure direct object reference in About Time Herowatch Go Server CVSS 4.0HIGH 8.7
Sources
- CVE-2026-121816 · CVE Program
- CVE-2026-121816 · NVD
- FIRST EPSS
- GHSA-g88g-cww8-g52p · GitHub Advisory Database · CC BY 4.0
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