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CISA KEV · ACTIVELY EXPLOITED
CRITICAL severity

CVE-2022-24990 — 0xf4n9x

CRITICAL

CVE-2022-24990 is a critical-severity (CVSS 9.8) Missing Authentication vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2023-02-10) and has been used in ransomware campaigns — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.

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…

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
16 known
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2023-02-10 — including use in ransomware campaigns. Federal agencies were required to remediate by 2023-03-03.
  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2022-24990.

EPSS Exploitation Probability

via FIRST.org ↗
83.2%probability of exploitation in next 30 days
Very High Risk+0.12%
Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk
79.6%85.7%91.8%97.8%94.4%94.4%83.6%83.0%83.2%May 26Sep 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2022-24990 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 395,249 CVEs with a current EPSS score, this one falls in the 50–90% band (highlighted). Counts from FIRST.org, log-scaled.

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.

Affected Products

1 product · 1 configurations
OS
terramaster operating systemterra-master
< 4.2.31
range
Exploits & PoCs
16

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Detection & mitigation playbook

Vulnerability
  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    No fixed release is recorded for CVE-2022-24990 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

How to detect CVE-2022-24990

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id cve-2022-24990 -u https://target
Template
TerraMaster TOS < 4.2.30 Server Information Disclosure
Severity
high
Impact
An attacker can exploit this vulnerability to gain sensitive information about the server, potentially leading to further attacks.
Remediation
Upgrade the TerraMaster TOS server to version 4.2.30 or later to mitigate the vulnerability.

Template by ProjectDiscovery nuclei-templates (dwisiswant0), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

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CVE-2022-24990: 0xf4n9x Missing Authentication (KEV)