CVE-2024-51139: Draytek Vigor2962 Firmware remote code execution (CVSS 9.8)

Description

Buffer Overflow vulnerability in Vigor2620/LTE200 3.9.8.9 and earlier and Vigor2860/2925 3.9.8 and earlier and Vigor2862/2926 3.9.9.5 and earlier and Vigor2133/2762/2832 3.9.9 and earlier and Vigor165/166 4.2.7 and earlier and Vigor2135/2765/2766 4.4.5.1 and earlier and Vigor2865/2866/2927 4.4.5.3 and earlier and Vigor2962/3910 4.3.2.8/4.4.3.1 and earlier and Vigor3912 4.3.6.1 and earlier allows a remote attacker to execute arbitrary code via the CGI parser's handling of the "Content-Length" header of HTTP POST requests.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Draytek Vigor1000b Firmware< 4.4.3.2

Draytek Vigor2133 Firmware< 3.9.9.2

Draytek Vigor2135 Firmware< 4.4.5.5

Draytek Vigor2620 Firmware< 3.9.9.1

Draytek Vigor2762 Firmware< 3.9.9.2

Draytek Vigor2763 Firmware< 4.4.5.5

Draytek Vigor2765 Firmware< 4.4.5.5

Draytek Vigor2766 Firmware< 4.4.5.5

Draytek Vigor2832 Firmware< 3.9.9.2

Draytek Vigor2860 Firmware< 3.9.8.3

Draytek Vigor2862 Firmware< 3.9.9.8

Draytek Vigor2865 Firmware< 4.4.5.8

Draytek Vigor2866 Firmware< 4.4.5.8

Draytek Vigor2915 Firmware< 4.4.5

Draytek Vigor2925 Firmware< 3.9.8.3

Draytek Vigor2926 Firmware< 3.9.9.8

Draytek Vigor2927 Firmware< 4.4.5.8

Draytek Vigor2952 Firmware< 3.9.8.5

Draytek Vigor2962 Firmware≥ 4.4.3 < 4.4.3.2 · < 4.3.2.9

Draytek Vigor3220 Firmware< 3.9.8.5

Draytek Vigor3910 Firmware≥ 4.4.3 < 4.4.3.2 · < 4.3.2.9

Draytek Vigor3912 Firmware< 4.4.3.2

Draytek Vigorlte200 Firmware< 3.9.9.1

Remediation

Fixed in

Draytek Vigor1000b Firmware≥ 4.4.3.2

Draytek Vigor2133 Firmware≥ 3.9.9.2

Draytek Vigor2135 Firmware≥ 4.4.5.5

Draytek Vigor2620 Firmware≥ 3.9.9.1

Draytek Vigor2762 Firmware≥ 3.9.9.2

Draytek Vigor2763 Firmware≥ 4.4.5.5

Draytek Vigor2765 Firmware≥ 4.4.5.5

Draytek Vigor2766 Firmware≥ 4.4.5.5

Draytek Vigor2832 Firmware≥ 3.9.9.2

Draytek Vigor2860 Firmware≥ 3.9.8.3

References

https://medium.com/faraday/advisory-multiple-vulnerabilities-affecting-draytek-routers-78a6cb8b3946Third Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2024-51139 being actively exploited?

CVE-2024-51139 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.00%.

How severe is CVE-2024-51139?

CVE-2024-51139 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 1.00% probability of exploitation.

Which products are affected by CVE-2024-51139?

Affected products include Draytek Vigor1000b Firmware, Draytek Vigor2133 Firmware, Draytek Vigor2135 Firmware, Draytek Vigor2620 Firmware, Draytek Vigor2762 Firmware, and 18 more.

How do I fix CVE-2024-51139?

Upgrade affected software to a fixed version, for example Draytek Vigor1000b Firmware 4.4.3.2, Draytek Vigor2133 Firmware 3.9.9.2, Draytek Vigor2135 Firmware 4.4.5.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-51139 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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