RCE in NETGEAR Ac2100
CVE-2020-27867
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. When parsing the funjsq_access_token parameter, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11653.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.022 (82.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.022 · change: -0.001
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilitie… (Vendor Advisory)
- www.zerodayinitiative.com/advisories/ZDI-20-1423/ (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27867?
- CVE-2020-27867 is a medium-severity vulnerability in NETGEAR Ac2100, classified under Command Injection. CVSS score: 6.8/10. Published 2021-02-12.
- How severe is CVE-2020-27867?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2020-27867 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.