About Time Technologies｜Herowatch Go Server - Insecure Direct Object Reference
All versions of About Time Technologies' Herowatch Go Server are listed as affected, and no fixed version is given.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
Do first: Workaround: The checked facts give no fix or workaround. Until a vendor update is available, limit which accounts can sign in to the affected Herowatch Go App and Server.
- Exploitation0/40No signal
- Exposure17/25No login or user action needed, reachable over the network without a login · Data gap: Advisories don't say whether default setups are affected
- Reach?/20Reach: unknown (data gap). No tracked technology or package matched
- Severity8.7/10CVSS 8.7
- No patch5/5No patch listed yet
What would change the score
- Would score about 76 if added to CISA KEV
- Would score about 71 if CISA's SSVC rates exploitation active
- Would score about 36 if advisories confirm default setups are exposed
CVE-2026-121817 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.7 (high) and affects Herowatch Go Server; no fixed version is listed yet.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.44% · 38th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 31/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Herowatch Go Server from About Time Technologies has an insecure direct object reference flaw that lets an attacker remotely, without logging in, change specific parameters to access or operate other users' data and functions.
Read the original 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.
What to do
Workaround: The checked facts give no fix or workaround. Until a vendor update is available, limit which accounts can sign in to the affected Herowatch Go App and Server.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- About Time Technologies Herowatch Go Server
All versions
Evidence 2
- Link
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-121817
Is CVE-2026-121817 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
An authenticated user can change specific parameters in requests to access or operate other users' data and functions. The flaw is an insecure direct object reference, meaning the server does not check that the requested object belongs to the requesting user.Source: twcert.org.tw
Which versions are affected by CVE-2026-121817?
Herowatch Go Server: all versions.Source: cve.now feed data
Am I affected, and how do I check?
The listed range covers all versions of Herowatch Go Server, and the condition is Herowatch Go App, all versions. To check an installed copy, compare its version against the vendor's release information.Source: twcert.org.tw
How do I fix CVE-2026-121817?
The checked facts name no fixed version, so no upgrade target can be given. Check the vendor's channels for an update and apply it once it is released.Source: twcert.org.tw
What if there's no patch?
The checked facts give no fix or workaround. Until a vendor update is available, limit which accounts can sign in to the affected Herowatch Go App and Server.Source: twcert.org.tw