CVE-2026-121818 About Time Technologies｜Herowatch Go - Security Misconfiguration
High 8.5
Published
Updated
Check this codebase for CVE-2026-121818 and fix it if it is affected.
What it is: CVE-2026-121818 is a high-severity vulnerability in About Time Technologies Herowatch Go, published on 4 Nov 2026.
Exploitation: There is no known exploitation of CVE-2026-121818 in the wild and no public exploit code.
Affected product: About Time Technologies Herowatch Go. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-121818/ (Markdown: https://insights.sbomify.com/CVE-2026-121818/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-121818?
CVE-2026-121818 is a high-severity vulnerability in About Time Technologies Herowatch Go, published on 4 Nov 2026.
Official description
Herowatch Mini developed by About Time Technologies has a system signing vulnerability. Authenticated local attackers can exploit a publicly available test key to sign malicious programs, allowing them to elevate privileges and execute arbitrary code.
Weakness: CWE-1394
Which versions are affected by CVE-2026-121818?
How do I fix CVE-2026-121818?
No fix has been published for CVE-2026-121818 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-121818 being exploited?
There is no known exploitation of CVE-2026-121818 in the wild and no public exploit code.
Sources
Also known as GHSA-54r8-946x-g5g5.