# CVE-2021-25910: ZIV AUTOMATION 4CCT vulnerable to improper authentication

> A local attacker can bypass authentication via the cookie parameter to modify device parameters as an authenticated user.

- **Severity:** High 8.0 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 29 Jan 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-c375-qwv9-rx4w

## What is CVE-2021-25910?

CVE-2021-25910 is a high-severity authentication bypass vulnerability in ZIV AUTOMATION 4CCT-EA6-334126BF, published on 29 Jan 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

Improper Authentication vulnerability in the cookie parameter of ZIV AUTOMATION 4CCT-EA6-334126BF allows a local attacker to perform modifications in several parameters of the affected device as an authenticated user.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2021-25910?

It affects 1 product.


Products: Zivautomation 4cct-Ea6-334126bf Firmware.

## How do I fix CVE-2021-25910?

No fix has been published for CVE-2021-25910 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-25910 being exploited?

There is no known exploitation of CVE-2021-25910 in the wild and no public exploit code.

## Other vulnerabilities in ZIV AUTOMATION 4CCT-EA6-334126BF

- [CVE-2021-25909](https://insights.sbomify.com/CVE-2021-25909/): ZIV AUTOMATION 4CCT Denial of Service vulnerability (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-25910 and fix it if it is affected.

What it is: CVE-2021-25910 is a high-severity authentication bypass vulnerability in ZIV AUTOMATION 4CCT-EA6-334126BF, published on 29 Jan 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-25910 in the wild and no public exploit code.

Affected product: ZIV AUTOMATION 4CCT-EA6-334126BF. 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-2021-25910/ (Markdown: https://insights.sbomify.com/CVE-2021-25910/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-25910
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-25910
- OSV: https://osv.dev/vulnerability/CVE-2021-25910

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-25910/
Summaries are generated and may contain mistakes; the official description above is the record.