How to check if you are exposed to CVE-2016-6277
- Find every NETGEAR Multiple Routers system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
- Compare each version with the fixed versions in the vendor advisory. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
- Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2016-6277.
US federal agencies had to fix this by 2022-09-07. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.
Affected versions
Versions the National Vulnerability Database lists as vulnerable to CVE-2016-6277. Check the vendor advisory for the exact fixed builds before you sign anything off.
| Product | Vulnerable versions |
|---|---|
| NETGEAR D6220 Firmware | up to and including 1.0.0.22 |
| NETGEAR D6400 Firmware | up to and including 1.0.0.56 |
| NETGEAR R6250 Firmware | up to and including 1.0.4.6_10.1.12 |
| NETGEAR R6400 Firmware | up to and including 1.0.1.18 |
| NETGEAR R6700 Firmware | up to and including 1.0.1.14 |
| NETGEAR R6900 Firmware | up to and including 1.0.1.14 |
NVD lists 5 more affected products; see the full record on NVD.
Timeline
- · Published in the National Vulnerability Database
- · Added to CISA's Known Exploited Vulnerabilities catalog, 1,909 days after it was published
- · Fix-by date for US federal agencies, passed 1,516 days ago
Weakness type
More exploited NETGEAR vulnerabilities
CISA lists 8 exploited NETGEAR vulnerabilities. The closest matches:
- CVE-2017-5521NETGEAR Multiple Devices Exposure of Sensitive Information VulnerabilityAdded 2022-09-08
- CVE-2017-6862NETGEAR Multiple Devices Buffer Overflow VulnerabilityAdded 2022-06-08
- CVE-2017-6334NETGEAR DGN2200 Devices OS Command Injection VulnerabilityAdded 2022-03-25
- CVE-2016-1555NETGEAR Multiple WAP Devices Command Injection VulnerabilityAdded 2022-03-25
- CVE-2016-10174NETGEAR WNR2000v5 Router Buffer Overflow VulnerabilityAdded 2022-03-25
- CVE-2017-6077NETGEAR DGN2200 Remote Code Execution VulnerabilityAdded 2022-03-07
- CVE-2020-26919Netgear JGS516PE Devices Missing Function Level Access Control VulnerabilityAdded 2021-11-03
Keep going
Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.