What is the CVSS score of CVE-2016-6277?

CVE-2016-6277 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 94.3%.

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

Yes, a public proof-of-concept exploit is available for CVE-2016-6277. Prioritise patching immediately. EPSS: 94.3%.

Is there a patch available for CVE-2016-6277?

Yes, a patch is available for CVE-2016-6277. Update the affected software to the latest version immediately.

Netgear CVE-2016-6277

HIGH

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

2016-12-14 cve@mitre.org

CSRF Netgear

8.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-352 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V3 - Web Frontend Security Anti-CSRF tokens, SameSite cookies MITRE ATT&CK 1 technique across 1 tactic: Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. CISA has confirmed active exploitation in the wild. Public proof-of-concept exploit code is available. EPSS exploitation probability: 94.33%.
Exploit ScenarioDerived	A remote attacker could trick authenticated users into performing unintended actions by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: In CISA KEV with patch available.

Exploited in the wild (CISA KEV) Patch available 94.3% exploitation probability (EPSS)

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AnalysisAI

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. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Actively exploited in the wild (cisa kev) and public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Implement anti-CSRF tokens, validate Origin/Referer headers, use SameSite cookie attribute.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Request Forgery (CSRF) (CWE-352), which allows attackers to trick authenticated users into performing unintended actions. 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/. Affected products include: Netgear D6220 Firmware, Netgear D6400 Firmware, Netgear R6250 Firmware, Netgear R6400 Firmware, Netgear R6700 Firmware. Version information: before 1.0.4.6..

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Apr 21, 2026 - 15:31 CISA

CVE Published

Dec 14, 2016 - 16:59 cve.org

HIGH 8.8

DescriptionCVE.org

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/.

Threat Intelligence Overview

Threat Score

7.6/10

Composite threat intelligence

EPSS Score

94.3%

Top 0% exploitable

Exploit

POC

Public exploit code exists

Data Quality

6 sources

Confidence: High

NVD

CVE.org

CISA KEV

EPSS POC (2)

Exploit-DB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV Yes

Public POC Yes

EPSS 94.3%

Patch available Yes

Active threat Yes

Deciding rule

In CISA KEV with patch available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Active

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

High

Priority Score

223

Low Medium High Critical

KEV: +50

EPSS: +94

CVSS: +44

PoC: +20

Weaponized: +15

Threat intel: 0

Gov advisory: 0

Attack Technique

Cross-Site Request Forgery MEDIUM

Cross-Site Request Forgery exploits the automatic credential inclusion behavior of web browsers.

Affected Products (CPE)CVE.org

cpe:2.3:o:netgear:d6220_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:d6400_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r6250_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r7100lg_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r7300dst_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r7900_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:netgear:r8000_firmware:*:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH http://kb.netgear.com/000036386/CVE-2016-582384 REF http://www.securityfocus.com/bid/94819 REF http://www.sj-vs.net/a-temporary-fix-for-cert-vu582384-cwe-77-on-netgear-r7000-and-r6400-routers/ REF https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-6277 REF https://www.kb.cert.org/vuls/id/582384

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