CVE-2016-6277

Exp

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/.

Published: 2016-12-14 Last update: 2026-04-21 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-6277 is rated Critical Active Threat (95.5/100): CVSS High severity, with high exploitation likelihood (EPSS 94.30%, 100th percentile). CISA KEV confirms active exploitation (added 2022-03-07) affecting NETGEAR / Multiple Routers. a weakness (CWE-352) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2016-6277

Name: NETGEAR Multiple Routers Remote Code Execution Vulnerability · CISA KEV detail

Exploit added: 2022-03-07

Action due: 2022-09-07

Required action: Apply updates per vendor instructions.

Public exploit references (Exploit-DB) for CVE-2016-6277

EDB-ID Source Kind Published Link
41598 exploit_db edb 2017-03-13 Exploit-DB ↗
40889 exploit_db edb 2016-12-07 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-6277

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-07 93.99% 94.30% +0.31%
2 2026-01-07 94.28% 93.99% -0.29%
3 2025-08-25 — 94.28% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-6277

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2016-6277

Affected software / configurations for CVE-2016-6277

Vendor Product Version Raw CPE
netgear d6220_firmware <= 1.0.0.22 cpe:2.3:o:netgear:d6220_firmware:*:*:*:*:*:*:*:*
netgear d6400_firmware <= 1.0.0.56 cpe:2.3:o:netgear:d6400_firmware:*:*:*:*:*:*:*:*
netgear r6250_firmware <= 1.0.4.6_10.1.12 cpe:2.3:o:netgear:r6250_firmware:*:*:*:*:*:*:*:*
netgear r6400_firmware <= 1.0.1.18 cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
netgear r6700_firmware <= 1.0.1.14 cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*
netgear r6900_firmware <= 1.0.1.14 cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*
netgear r7000_firmware <= 1.0.7.2_1.1.93 cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:*
netgear r7100lg_firmware <= 1.0.0.28 cpe:2.3:o:netgear:r7100lg_firmware:*:*:*:*:*:*:*:*
netgear r7300dst_firmware <= 1.0.0.46 cpe:2.3:o:netgear:r7300dst_firmware:*:*:*:*:*:*:*:*
netgear r7900_firmware <= 1.0.1.8 cpe:2.3:o:netgear:r7900_firmware:*:*:*:*:*:*:*:*
netgear r8000_firmware <= 1.0.3.26 cpe:2.3:o:netgear:r8000_firmware:*:*:*:*:*:*:*:*

References for CVE-2016-6277

URL Tags
http://kb.netgear.com/000036386/CVE-2016-582384 Patch Vendor Advisory
http://packetstormsecurity.com/files/155712/Netgear-R6400-Remote-Code-Execution.html Exploit Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/94819 Broken Link Third Party Advisory VDB Entry
http://www.sj-vs.net/a-temporary-fix-for-cert-vu582384-cwe-77-on-netgear-r7000-and-r6400-routers/ Broken Link Mitigation Third Party Advisory
https://kalypto.org/research/netgear-vulnerability-expanded/ Broken Link Exploit Third Party Advisory
https://www.exploit-db.com/exploits/40889/ Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/41598/ Exploit Third Party Advisory VDB Entry
https://www.kb.cert.org/vuls/id/582384 Third Party Advisory US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-6277 US Government Resource
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