# CVE-2022-24990: TerraMaster NAS - Authentication Bypass

> Live exploitation tracking for CVE-2022-24990 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2022-24990

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 9.8
- **Public exploit available:** Yes
- **Affected products:** TerraMaster NAS
- **Weaknesses:** CWE-306 (Missing Authentication for Critical Function)
- **Tags:** nas, file_sharing

## Description

TerraMaster NAS 4.2.29 and earlier allows remote attackers to discover the administrative password by sending "User-Agent: TNAS" to module/api.php?mobile/webNasIPS and then reading the PWD field in the response.

## CrowdSec analysis

[CVE-2022-24990](https://euvd.enisa.europa.eu/vulnerability/CVE-2022-24990) is a critical vulnerability in TerraMaster NAS 4.2.29 and earlier that allows remote attackers to obtain the administrative password by exploiting a flaw in the API response. By sending a specially crafted User-Agent header, attackers can easily retrieve sensitive credentials, potentially leading to full system compromise and unauthorized access to stored data.

CrowdSec has been tracking this vulnerability and its exploits since 8th of April 2026.

CrowdSec network data shows that most actors exploiting CVE-2022-24990 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature.
Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2022-24990 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2022-24990 is currently experiencing high visibility and active exploitation across the internet.

Attackers exploit this vulnerability by sending GET requests to `/module/api.php?mobile/webNasIPS` with a "TNAS" User-Agent, aiming to retrieve sensitive server information from TerraMaster NAS devices running vulnerable TOS versions.

## Timeline

- 2023-02-07: CVE Published. CVE-2022-24990 is published to NVD.
- 2023-02-10: CISA KEV. CVE-2022-24990 is added to the Known Exploited Vulnerabilities catalog by CISA.
- 2023-03-03: CISA Remediation Deadline. Expiration of the CISA remediation deadline as described in [BOD 22-01](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities).
- 2026-04-08: Rule Released. CrowdSec releases a rule to detect CVE-2022-24990 exploitation attempts against the CrowdSec Network.
- 2026-04-08: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2022-24990 for the first time.

## References

- https://github.com/0xf4n9x/CVE-2022-24990
- https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=33732
- https://octagon.net/blog/2022/03/07/cve-2022-24990-terrmaster-tos-unauthenticated-remote-command-execution-via-php-object-instantiation/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24990
- http://packetstormsecurity.com/files/172904/TerraMaster-TOS-4.2.29-Remote-Code-Execution.html
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2022/CVE-2022-24990.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2022-24990) follows observed exploitation activity for CVE-2022-24990. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.