Exploited· due 2022-06-148.0highHighused in ransomware
CVE-2018-19943
Qnap Qts
If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed these issues in the following QTS versions. QTS 4.4.2.1270 build 20200410 and later QTS 4.4.1.1261 build 20200330 and later QTS 4.3.6.1263 build 20200330 and later QTS 4.3.4.1282 build 20200408 and later QTS 4.3.3.1252 build 20200409 and later QTS 4.2.6 build 20200421 and later
Exploitation status
- CISA has confirmed this is being exploited in the wild. That is an observation of real attacks, not a prediction.
- It is known to have been used in ransomware campaigns.
- US federal civilian agencies are required to remediate it by 2022-06-14. That deadline does not bind private companies, but it is a reasonable benchmark for how urgently CISA views it.
- A vendor advisory or patch reference has been published.
Required action
Apply updates per vendor instructions.
CISA’s wording, unedited.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, exploitation depends on conditions outside the attacker's control.
- To exploit it, an ordinary user account is needed.
- Beyond that, someone has to be persuaded to take an action first.
Scoring
- CVSS
- 8.0 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H- Weakness
- CWE-79
- Assigned by
- security@qnapsecurity.com.tw
Dates
- Published
- 2020-10-28
- Last modified
- 2026-08-13
- Added to KEV
- 2022-05-24
- Remediation due
- 2022-06-14
- Sources
- CISA KEV, NVD
Affected products
- Qnap Qts- 4.2.6, 4.3.1.0013 - 4.3.3.1252, 4.3.4 - 4.3.4.1282, 4.3.6 - 4.3.6.1263, 4.4.0 - 4.4.1.1261, 4.4.2 - 4.4.2.1270, 4.2.6
As listed in the NVD configuration data. Not a statement about your estate.