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Known exploited vulnerability

CVE-2021-20123

highCVSS 3.1 7.5In CISA KEVEPSS 90%Published · n/a

The short answer

CVE-2021-20123 affects n/a Draytek VigorConnect and is rated high (CVSS 7.5). CISA added it to the Known Exploited Vulnerabilities catalog on 2024-09-03: attackers are using it, so patch it first.

What it is

A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.

Weakness: CWE-22.

Severity

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploited (CISA KEV)

Yes, since Sep 3, 2024

Federal due date Sep 24, 2024

EPSS, next 30 days

90%

Higher than 100% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

What CISA says to do

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected products

Draytek VigorConnect, vigorconnect. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2021-20123 being exploited?

Yes. CISA added CVE-2021-20123 to its Known Exploited Vulnerabilities catalog on 2024-09-03, with a federal remediation due date of 2024-09-24.

How do I fix CVE-2021-20123?

CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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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