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CVE-2022-24990

From Exploited flaws, HARD’s guide to the flaws being used in attacks · Checked
This article is about a flaw in TerraMaster OS. For every flaw being used in attacks, see Exploited flaws.

CVE-2022-24990 is a security flaw in TerraMaster OS. Attackers can run commands on TerraMaster OS from anywhere, without logging in. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 10 Feb 2023, and says ransomware gangs have used it.[1]

TerraMaster OS is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. TerraMaster has published a fix or advice.

Description

CISA calls it an OS remote command execution in TerraMaster TerraMaster OS. In its words: “TerraMaster OS contains a remote command execution vulnerability that allows an unauthenticated user to execute commands on the target endpoint.”[1]

The CVE record adds: “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.”[2]

The underlying weakness is missing authentication (CWE-306), in MITRE’s list of common software weaknesses.

It scores 7.5 out of 10 on the Common Vulnerability Scoring System, which rates it high, scored by NVD using CVSS 3.1.[2]

Affected versions

NVD’s record doesn’t list version ranges for it; TerraMaster’s advisory has them[3]. CISA names the product as TerraMaster TerraMaster OS.

Most families won’t have TerraMaster OS; it’s for whoever looks after IT at work.

Exploitation

CISA added it to its catalog of known exploited vulnerabilities on 10 Feb 2023, 3 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 3 Mar 2023 to fix it.[1] CISA says ransomware gangs have used it.

FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 83%. That’s in the top 1% of the flaws it scores.[4]

CISA assesses it as automatable: attackers can run it against many targets at once.

CISA doesn’t say who was attacked, or how.

Fix

TerraMaster has published a fix or advice.[3] CISA’s required action: “Apply updates per vendor instructions.”[1]

  1. Check whether you use it.TerraMaster OS is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
  2. Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 3 Mar 2023 to fix it.
  3. If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.

You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.

Timeline

DateEvent
The flaw is made public in the National Vulnerability Database, with a severity score of 7.5.[2]
CISA adds it to its catalog of flaws known to be used in attacks, noting that ransomware gangs have used it.[1]
CISA’s deadline for US government agencies to fix it.[1]
FIRST puts the odds of it being used in attacks in the next 30 days at 83%.[4]

See also

Other missing authentication flaws

  • CVE-2026-111357, Ivanti Connect Secure: missing authentication for critical function ·
  • CVE-2026-67277, MikroTik RouterOS: missing authentication for critical function ·
  • CVE-2026-81578, PaperCut NG/MF: missing authentication for critical function ·
  • CVE-2026-72529, TrueConf Server: missing authentication for critical function ·
  • CVE-2026-56164, Microsoft SharePoint Server: missing authentication for critical function ·

Added the same day

  • CVE-2023-0669, Fortra GoAnywhere MFT: remote code execution ·
  • CVE-2015-2291, Intel Ethernet Diagnostics Driver for Windows: denial-of-service ·

References

  1. ^ Cybersecurity and Infrastructure Security Agency. “TerraMaster OS Remote Command Execution Vulnerability”. Known Exploited Vulnerabilities Catalog, added 10 Feb 2023.
  2. ^ National Institute of Standards and Technology. “CVE-2022-24990 Detail”. National Vulnerability Database, published 7 Feb 2023.
  3. ^ TerraMaster. Advisories and fixes: forum.terra-master.com, forum.terra-master.com.
  4. ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.832, percentile 99.7, 31 Oct 2026.
  5. CVE Program. “CVE-2022-24990”. The official CVE record.

This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.