TI-2021-11800 Aliases CVE-2021-31802 GHSA-89v8-28p6-p87r

NETGEAR R7000 1.0.11.116 devices have a heap-based Buffer Overflow that is exploitable…

MEDIUM 53CWE-787Published 2021-04-26 · Updated 2024-08-03

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

NETGEAR R7000 1.0.11.116 devices have a heap-based Buffer Overflow that is exploitable from the local network without authentication. The vulnerability exists within the handling of an HTTP request. An attacker can leverage this to execute code as root. The problem is that a user-provided length value is trusted during a backup.cgi file upload. The attacker must add a \n before the Content-Length header.

Why it matters now

EPSS 0.14177 96th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:netgear:r7000_firmware::::::::	up to 1.0.11.116	Vulnerable	NETGEAR
cpe:2.3:h:netgear:r7000:-:::::::*	not specified by NVD	Running on	NETGEAR

cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:* Versions up to 1.0.11.116 Vulnerable ·NETGEAR
cpe:2.3:h:netgear:r7000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-31802
2026-10-03 Alias added: GHSA-89v8-28p6-p87r

References

Exploit 1

https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk-r7000-httpd-preauth-rce/

Advisory 1

https://www.netgear.com/about/security/

TI-2016-05377 NETGEAR R6250 before 1.0.4.6.Beta, R6400 before 1.0.1.18.Beta, R6700 before… KEVCVSS 3.1HIGH 8.8
TI-2022-10624 Buffer overflow in NETGEAR R6700v3 CVSS 3.1HIGH 8.8
TI-2024-01335 Netgear R7000 Web Management Interface currentsetting.htm information disclosure CVSS 4.0MEDIUM 5.3
TI-2023-18149 Buffer Overflow vulnerability in NETGEAR R6400v2 before version 1.0.4.118, allows remote… CVSS 3.1CRITICAL 9.8
TI-2022-17353 Netgear Nighthawk AC1900 Smart WiFi Dual Band Gigabit Router R7000-V1.0.11.134_10.2.119… CVSS 3.1CRITICAL 9.8
TI-2024-23455 Netgear R7000 1.0.11.136 is vulnerable to Command Injection in RMT_invite.cgi via device_name2 parameter. CVSS 3.1HIGH 8.4

See all 140 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences