# CVE-2026-34790: Endian Firewall /cgi-bin/backup.cgi remove ARCHIVE Directory Traversal

> Authenticated attackers can delete arbitrary files on Endian Firewall via directory traversal in the backup CGI script.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Apr 2026
- **Updated:** 25 May 2026
- **Also known as:** GHSA-757j-pp37-wg8v

## What is CVE-2026-34790?

CVE-2026-34790 is a high-severity path traversal vulnerability in Endian Firewall, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Endian Firewall version 3.3.25 and prior allow authenticated users to delete arbitrary files via directory traversal in the remove ARCHIVE parameter to /cgi-bin/backup.cgi. The remove ARCHIVE parameter value is used to construct a file path without sanitization of directory traversal sequences, which is then passed to an unlink() call.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-34790?

It affects 1 product.


Products: Endian Firewall Community.

## How do I fix CVE-2026-34790?

No fix has been published for CVE-2026-34790 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-34790 being exploited?

There is no known exploitation of CVE-2026-34790 in the wild and no public exploit code.

## Other vulnerabilities in Endian Firewall

- [CVE-2021-27201](https://insights.sbomify.com/CVE-2021-27201/): Command injection in n/a (high 8.8)
- [CVE-2026-34791](https://insights.sbomify.com/CVE-2026-34791/): Endian Firewall /cgi-bin/logs_proxy.cgi DATE Perl Command Injection (high 8.7)
- [CVE-2026-34792](https://insights.sbomify.com/CVE-2026-34792/): Endian Firewall /cgi-bin/logs_clamav.cgi DATE Perl Command Injection (high 8.7)
- [CVE-2026-34793](https://insights.sbomify.com/CVE-2026-34793/): Endian Firewall /cgi-bin/logs_firewall.cgi DATE Perl Command Injection (high 8.7)
- [CVE-2026-34794](https://insights.sbomify.com/CVE-2026-34794/): Endian Firewall /cgi-bin/logs_ids.cgi DATE Perl Command Injection (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34790 and fix it if it is affected.

What it is: CVE-2026-34790 is a high-severity path traversal vulnerability in Endian Firewall, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-34790 in the wild and no public exploit code.

Affected product: Endian Firewall. 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-2026-34790/ (Markdown: https://insights.sbomify.com/CVE-2026-34790/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34790
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34790
- OSV: https://osv.dev/vulnerability/CVE-2026-34790

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34790/
Summaries are generated and may contain mistakes; the official description above is the record.