What is CVE-2023-36499?

CVE-2023-36499 is a high-severity vulnerability in NETGEAR Xr300, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2023-08-07.

How severe is CVE-2023-36499?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in NETGEAR Xr300

CVE-2023-36499

Netgear XR300 v1.0.3.78 was discovered to contain multiple buffer overflows via the wla_ssid and wlg_ssid parameters at genie_ap_wifi_change.cgi.

Vulnerability class: Buffer Overflow

Published 2023-08-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

NETGEAR Xr300
NETGEAR Xr300 Firmware — versions 1.0.3.78

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.netgear.com/about/security/ (Vendor Advisory)
github.com/FirmRec/IoT-Vulns/blob/main/netgear/nvram_ssid/README.md (Exploit)

Frequently asked questions

What is CVE-2023-36499?: CVE-2023-36499 is a high-severity vulnerability in NETGEAR Xr300, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2023-08-07.
How severe is CVE-2023-36499?: High severity. CVSS v3 base score is 8.8 out of 10.