Known exploited vulnerability
CVE-2018-19943
The short answer
CVE-2018-19943 affects QNAP Systems Inc. QTS and is rated medium (CVSS 5.4). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-05-24: attackers are using it, so patch it first.
What it is
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
Severity
5.4 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Exploited (CISA KEV)
Yes, since May 24, 2022
Federal due date Jun 14, 2022
EPSS, next 30 days
23%
Higher than 98% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
What CISA says to do
Apply updates per vendor instructions.
Affected products
QTS. NVD's record lists the exact affected versions.
References
- www.qnap.com/zh-tw/security-advisory/qsa-20-01 Vendor Advisory
- www.qnap.com/zh-tw/security-advisory/qsa-20-01 Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19943 US Government Resource
Questions
Is CVE-2018-19943 being exploited?
Yes. CISA added CVE-2018-19943 to its Known Exploited Vulnerabilities catalog on 2022-05-24, with a federal remediation due date of 2022-06-14. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2018-19943?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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