What is CVE-2016-6277?

CVE-2016-6277 is a high-severity vulnerability in NETGEAR D6220, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2016-12-14.

How severe is CVE-2016-6277?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2016-6277 known to be exploited?

Yes. CVE-2016-6277 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-07), indicating it is being actively exploited. 20 public proof-of-concept repositories are indexed.

CSRF in NETGEAR D6220

CVE-2016-6277

NETGEAR R6250 before 1.0.4.6.Beta, R6400 before 1.0.1.18.Beta, R6700 before 1.0.1.14.Beta, R6900, R7000 before 1.0.7.6.Beta, R7100LG before 1.0.0.28.Beta, R7300DST before 1.0.0.46.Beta, R7900 before 1.0.1.8.Beta, R8000 before 1.0.3.26.Beta, D6220, D6400, D7000, and possibly other routers allow remote attackers to execute arbitrary commands via shell metacharacters in the path info to cgi-bin/.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2016-12-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.998 (100.0th percentile), scored 2026-10-15.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 100.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.998 · newest: 0.998 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-07. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-09-07.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

www.exploit-db.com/exploits/40889/ (VDB Entry, Third Party Advisory, exploit)
www.exploit-db.com/exploits/41598/ (Exploit, VDB Entry, Third Party Advisory, exploit)
kb.netgear.com/000036386/CVE-2016-582384 (Patch, Vendor Advisory)
www.sj-vs.net/a-temporary-fix-for-cert-vu582384-cwe-77-on-netgear-r7000-and-r64… (Third Party Advisory, Mitigation, Broken Link)
www.kb.cert.org/vuls/id/582384 (US Government Resource, Third Party Advisory, third-party-advisory)
www.securityfocus.com/bid/94819 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
kalypto.org/research/netgear-vulnerability-expanded/ (Exploit, Third Party Advisory, Broken Link)
packetstormsecurity.com/files/155712/Netgear-R6400-Remote-Code-Execution.html (Exploit, VDB Entry, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2016-6277?: CVE-2016-6277 is a high-severity vulnerability in NETGEAR D6220, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.8/10. Published 2016-12-14.
How severe is CVE-2016-6277?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2016-6277 known to be exploited?: Yes. CVE-2016-6277 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-07), indicating it is being actively exploited. 20 public proof-of-concept repositories are indexed.