RCE in NETGEAR Cbk40
CVE-2020-27861
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Orbi 2.5.1.16 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the UA_Parser utility. A crafted Host Name option in a DHCP request can trigger execution of a system call composed from a user-supplied string. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11076.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.020 (79.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
- zdi-disclosures@trendmicro.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-27861?
- CVE-2020-27861 is a high-severity vulnerability in NETGEAR Cbk40, classified under OS Command Injection. CVSS score: 8.8/10. Published 2021-02-12.
- How severe is CVE-2020-27861?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-27861 known to be exploited?
- 11 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.