TI-2026-84974 Aliases CVE-2026-121817 GHSA-33f3-4jq2-r259

Insecure direct object reference in About Time Herowatch Go Server

LOW 38CWE-639Published 2026-11-04 · Updated 2026-11-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

About Time Technologies' Herowatch Go Server is affected in all versions. An insecure direct object reference flaw (CWE-639) lets an authenticated remote attacker change specific parameters to access or operate other users' data and functions.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00443 38th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

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 Go Server	all	—	No fix listed	CNA

Herowatch Go Server VendorAbout Time Technologies Affected all Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Herowatch Go Server.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Timeline

2026-11-04 Threatist record created from CVE-2026-121817
2026-11-04 Affected versions changed · CNA
2026-11-04 Alias added: GHSA-33f3-4jq2-r259
2026-11-04 CISA SSVC decision points changed
2026-11-04 Priority changed: MEDIUM → LOW

References

Advisory 2

TI-2026-84973 Missing authentication in Herowatch Mini exposes ADB shell CVSS 4.0HIGH 8.7
TI-2026-84975 Public test signing key in Herowatch Go enables privilege escalation CVSS 4.0HIGH 8.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences