How severe is CVE-2016-6277?

CVE-2016-6277 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-6277 being actively exploited?

Yes. CVE-2016-6277 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-07, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2016-6277?

CVE-2016-6277 primarily affects Netgear D6220 Firmware. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-6277?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2016-6277 have an EU (EUVD) identifier?

Yes. CVE-2016-6277 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-7207. It is also flagged as exploited in the EUVD (since 2022-03-07).

When was CVE-2016-6277 published?

CVE-2016-6277 was published on 2016-12-14 and last updated on 2026-06-17.

CVE-2016-6277

CVE-2016-6277 is a high-severity vulnerability in Netgear D6220 Firmware with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-07). The underlying weakness is classified as CWE-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.3
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-07)
EU (EUVD) id: EUVD-2016-7207
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-07)
Weakness: CWE-352
Affected product: Netgear D6220 Firmware
Published: 2016-12-14
Last modified: 2026-06-17

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/.

Frequently asked questions

What is 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/.
How severe is CVE-2016-6277?: CVE-2016-6277 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-6277 being actively exploited?: Yes. CVE-2016-6277 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-07, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2016-6277?: CVE-2016-6277 primarily affects Netgear D6220 Firmware. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-6277?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2016-6277 have an EU (EUVD) identifier?: Yes. CVE-2016-6277 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-7207. It is also flagged as exploited in the EUVD (since 2022-03-07).
When was CVE-2016-6277 published?: CVE-2016-6277 was published on 2016-12-14 and last updated on 2026-06-17.

References

Affected products (11)

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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