Which products and versions are affected by CVE-2016-6277?

Affected: D6220 Firmware (Netgear); D6400 Firmware (Netgear); R6250 Firmware (Netgear), among others. The full list is in the CVE brief.

Is CVE-2016-6277 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 1, 2018.

Is CVE-2016-6277 in the CISA KEV catalog?

Yes. It was added on Mar 7, 2022 with a federal remediation due date of Sep 7, 2022.

Is there a public exploit for CVE-2016-6277?

Public exploit code is available.

Is there a fix for CVE-2016-6277?

Fixed versions are available, including D6220 Firmware 1.0.0.22, D6400 Firmware 1.0.0.56, R6250 Firmware 1.0.4.6_10.1.12.

How urgently should CVE-2016-6277 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2016-6277

HighExploitedPublic exploit

Published Dec 14, 2016 · Updated Apr 21, 2026

Key Facts

Patch immediately

CVE-2016-6277 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting D6220 Firmware (Netgear), D6400 Firmware (Netgear), R6250 Firmware (Netgear) and 8 more products.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 1, 2018. Public exploit code is available.
EPSS estimates a 100% probability of exploitation in the next 30 days.
Fixed versions are available, including D6220 Firmware 1.0.0.22, D6400 Firmware 1.0.0.56, R6250 Firmware 1.0.4.6_10.1.12.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

8.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

100%

Higher than 99.9% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2016-6277 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

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/.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Mar 7, 2022	Sep 7, 2022	Not reported
Industry KEV feed	Mar 1, 2018	Sep 7, 2022	Not reported
CIRCL KEV	Mar 7, 2022	Sep 7, 2022	Not reported
ENISA EUVD	Mar 7, 2022	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

11 affected entries in total

Product	Affected versions	Fixed in
D6220 FirmwareNetgear	See advisory	1.0.0.22
D6400 FirmwareNetgear	See advisory	1.0.0.56
R6250 FirmwareNetgear	See advisory	1.0.4.6_10.1.12
R6400 FirmwareNetgear	See advisory	1.0.1.18
R6700 FirmwareNetgear	See advisory	1.0.1.14

6 more affected products in the full CVE brief

Patched Releases

D6220 Firmware

1.0.0.22

D6400 Firmware

1.0.0.56

R6250 Firmware

1.0.4.6_10.1.12

R6400 Firmware

1.0.1.18

R6700 Firmware

1.0.1.14

R6900 Firmware

1.0.1.14

R7000 Firmware

1.0.7.2_1.1.93

R7100lg Firmware

1.0.0.28

R7300dst Firmware

1.0.0.46

R7900 Firmware

1.0.1.8

R8000 Firmware

1.0.3.26

Timeline

Publicly disclosed
Dec 14, 2016
Added to Industry KEV feed
Mar 1, 2018
Added to CISA KEV
Mar 7, 2022
Added to CIRCL KEV
Mar 7, 2022
Added to ENISA EUVD
Mar 7, 2022
Last updated
Apr 21, 2026

Weakness Type

CWE-352 Cross-Site Request Forgery (CSRF)

References

advisory40889
advisoryVU#582384
advisory94819
advisoryhttp://www.sj-vs.net/a-temporary-fix-for-cert-vu582384-cwe-77-on-netgear-r7000-and-r6400-routers/
patchhttp://kb.netgear.com/000036386/CVE-2016-582384

15 more references in the full CVE brief

FAQ

Common Questions.

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 exec…
Affected: D6220 Firmware (Netgear); D6400 Firmware (Netgear); R6250 Firmware (Netgear), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 1, 2018.
Yes. It was added on Mar 7, 2022 with a federal remediation due date of Sep 7, 2022.
Public exploit code is available.
Fixed versions are available, including D6220 Firmware 1.0.0.22, D6400 Firmware 1.0.0.56, R6250 Firmware 1.0.4.6_10.1.12.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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