---
title: "CVE-2017-8229: Amcrest IPM-721S V2.420.AC00.16.R.20160909… | CubePath"
description: "Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices allow an unauthenticated attacker to download the administrative credentials. If the firmware version…"
language: en
source: https://cubepath.com/security/cve/CVE-2017-8229
---

# CVE-2017-8229: Amcrest IPM-721S V2.420.AC00.16.R.20160909… | CubePath

## Description

Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices allow an unauthenticated attacker to download the administrative credentials. If the firmware version V2.420.AC00.16.R 9/9/2016 is dissected using binwalk tool, one obtains a \_user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable function that sets up the default credentials on the device. If one opens this binary in IDA-pro one will notice that this follows a ARM little endian format. The function sub\_436D6 in IDA pro is identified to be setting up the configuration for the device. If one scrolls to the address 0x000437C2 then one can see that /current\_config is being set as an ALIAS for /mnt/mtd/Config folder on the device. If one TELNETs into the device and navigates to /mnt/mtd/Config folder, one can observe that it contains various files such as Account1, Account2, SHAACcount1, etc. This means that if one navigates to http://\[IPofcamera\]/current\_config/Sha1Account1 then one should be able to view the content of the files. The security researchers assumed that this was only possible only after authentication to the device. However, when unauthenticated access tests were performed for the same URL as provided above, it was observed that the device file could be downloaded without any authentication.

Official description from the CVE record, published by mitre. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2017-8229)

## Key data

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.74243 (74.2% probability)

Percentile

99.5%

Scores of

Nov 10, 2026

Model

v2026.06.15

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [20190609 Newly releases IoT security issues](https://seclists.org/bugtraq/2019/Jun/8)  (seclists.org) mailing-list
- [packetstormsecurity.com/files/153224/Amcrest-IPM-721S-Crede…](http://packetstormsecurity.com/files/153224/Amcrest-IPM-721S-Credential-Disclosure-Privilege-Escalation.html)
- [github.com/ethanhunnt/IoT\_vulnerabilities/blob/master/Amcre…](https://github.com/ethanhunnt/IoT%5Fvulnerabilities/blob/master/Amcrest%5Fsec%5Fissues.pdf)

## Timeline

1. ID reserved Apr 25, 2017
2. Record published Jul 3, 2019
3. Record last updated Aug 5, 2024

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## About CubePath

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:58 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)