CVE-2019-12513: Stored XSS via DHCP Discover Request Hostname

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-02-24 · updated 2026-06-17
Weakness: CWE-79

Description

In NETGEAR Nighthawk X10-R900 prior to 1.0.4.24, by sending a DHCP discover request containing a malicious hostname field, an attacker may execute stored XSS attacks against this device. When the malicious DHCP request is received, the device will generate a log entry containing the malicious hostname. This log entry may then be viewed at Advanced settings->Administration->Logs to trigger the exploit. Although this value is inserted into a textarea tag, converted to all-caps, and limited in length, attacks are still possible.

Affected products

NETGEAR Nighthawk X10-R9000 Firmware: before 1.0.4.24 — fixed in 1.0.4.24

How to fix

Upgrade to a fixed version: NETGEAR Nighthawk X10-R9000 Firmware 1.0.4.24. Check the vendor advisory for mitigations.

References

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