# CVE-2020-37104: ASTPP 4.0.1 VoIP Billing - Database Backup Download

> Unauthenticated attackers can download sensitive database backups by guessing filenames, exposing confidential data in ASTPP VoIP billing systems.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Feb 2026
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-f9c8-6hr7-729r

## What is CVE-2020-37104?

CVE-2020-37104 is a high-severity vulnerability in ASTPP, published on 11 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ASTPP 4.0.1 contains an information disclosure vulnerability that allows unauthenticated attackers to download database backup files by predicting backup filename patterns. Attackers can generate a list of 6-digit PIN combinations and fuzz the backup download URL to exfiltrate sensitive database information from the /database_backup/ directory.

Weakness: CWE-538 (Insertion of Sensitive Information into Externally-Accessible File or Directory)

## Which versions are affected by CVE-2020-37104?

It affects 1 product.


Products: Inextrix Astpp.

## How do I fix CVE-2020-37104?

No fix has been published for CVE-2020-37104 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-37104 being exploited?

There is no known exploitation of CVE-2020-37104 in the wild and no public exploit code.

## Other vulnerabilities in ASTPP

- [CVE-2020-37153](https://insights.sbomify.com/CVE-2020-37153/): ASTPP VoIP 4.0.1 - Remote Code Execution (high 7.7)
- [CVE-2019-15075](https://insights.sbomify.com/CVE-2019-15075/): Hardcoded credentials in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-37104 and fix it if it is affected.

What it is: CVE-2020-37104 is a high-severity vulnerability in ASTPP, published on 11 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-37104 in the wild and no public exploit code.

Affected product: ASTPP. 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-2020-37104/ (Markdown: https://insights.sbomify.com/CVE-2020-37104/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-37104
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-37104
- OSV: https://osv.dev/vulnerability/CVE-2020-37104

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-37104/
Summaries are generated and may contain mistakes; the official description above is the record.