CVE-2021-27239

Published Mar 29, 2021 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the upnpd service, which listens on UDP port 1900 by default. A crafted MX header field in an SSDP message can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11851.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2021-14004 This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6400 and R6700 firmware version 1.0.4.98 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the upnpd service, which listens on UDP port 1900 by default. A crafted MX header field in an SSDP message can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11851.
History

No history.

Subscriptions

Weaknesses

Sources

Status
PUBLISHED
Assigner
zdi
Published
Updated
Aug 3, 2024, 8:48 PM
Reserved
Feb 16, 2021, 12:00 AM
Status
Modified
Published
Mar 29, 2021, 9:15 PM
Modified
Jun 17, 2026, 3:44 AM