In Netgear XR300 V1.0.3.38_10.3.30, a stack-based buffer overflow exists in the HTTPD service through the usb_device.cgi endpoint.

published 2025-07-15 last yr. modified 2026-06-17 4mo ago also EUVD-2025-21455

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits: 0; none known

In Netgear XR300 V1.0.3.38_10.3.30, a stack-based buffer overflow exists in the HTTPD service through the usb_device.cgi endpoint. The vulnerability occurs when processing POST requests containing the read_access parameter.

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CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: last yr. (2025-07-15)

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

github.com https://github.com/lafdrew/IOT/blob/main/Netgear%20XR300/read_access%20of%20usb_device.cgi/buffer%20overflow%20in%20read_access%20of%20usb_device.cgi.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Classification

Weakness

CWE-121 Stack-based Buffer Overflow

References

github.com /lafdrew/IOT/blob/main/Netgear%20XR300/read_access%20of%20usb_device.cgi/buffer%20overflow%20in%20read_access%
exploit, third-party-advisory

Sources

CVE List CVE-2025-52082
NVD CVE-2025-52082

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