How severe is CVE-2024-43027?

CVE-2024-43027 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-43027 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-43027?

CVE-2024-43027 primarily affects Draytek Vigor300b Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-43027?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-43027 have an EU (EUVD) identifier?

Yes. CVE-2024-43027 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-40018.

When was CVE-2024-43027 published?

CVE-2024-43027 was published on 2024-08-21 and last updated on 2026-06-17.

CVE-2024-43027

CVE-2024-43027 is a high-severity vulnerability in Draytek Vigor300b Firmware with a CVSS 3.x base score of 8.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 8.0)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-40018
Weakness: CWE-77
Affected product: Draytek Vigor300b Firmware
Published: 2024-08-21
Last modified: 2026-06-17

Description

DrayTek Vigor 3900 before v1.5.1.5_Beta, DrayTek Vigor 2960 before v1.5.1.5_Beta and DrayTek Vigor 300B before v1.5.1.5_Beta were discovered to contain a command injection vulnerability via the action parameter at cgi-bin/mainfunction.cgi.

Frequently asked questions

What is CVE-2024-43027?: DrayTek Vigor 3900 before v1.5.1.5_Beta, DrayTek Vigor 2960 before v1.5.1.5_Beta and DrayTek Vigor 300B before v1.5.1.5_Beta were discovered to contain a command injection vulnerability via the action parameter at cgi-bin/mainfunction.cgi.
How severe is CVE-2024-43027?: CVE-2024-43027 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-43027 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-43027?: CVE-2024-43027 primarily affects Draytek Vigor300b Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-43027?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-43027 have an EU (EUVD) identifier?: Yes. CVE-2024-43027 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-40018.
When was CVE-2024-43027 published?: CVE-2024-43027 was published on 2024-08-21 and last updated on 2026-06-17.

References

https://github.com/N1nEmAn/wp/blob/main/V3900.md

Affected products (3)

cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:draytek:vigor2960_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:draytek:vigor3900_firmware:*:*:*:*:*:*:*:*

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