Vulnerability in NETGEAR Br200
CVE-2021-27251
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Authentication is not required to exploit this vulnerability The specific flaw exists within handling of firmware updates. The issue results from a fallback to a insecure protocol to deliver updates. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12308.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.007 (52.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some… (Patch, Vendor Advisory)
- www.zerodayinitiative.com/advisories/ZDI-21-247/ (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27251?
- CVE-2021-27251 is a high-severity vulnerability in NETGEAR Br200, classified under Cleartext Transmission of Sensitive Information. CVSS score: 8.8/10. Published 2021-04-14.
- How severe is CVE-2021-27251?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-27251 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.