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/.
The record classifies CVE-2016-6277 under weakness class CWE-352. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. The identifier was first published 3587 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 99.8% probability of exploitation in the next 30 days, higher than 99.9% of all scored CVEs
- CISA KEV
- Listed since 2022-03-07, federal remediation deadline 2022-09-07
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2016-12-14, last modified 2025-10-21
Is CVE-2016-6277 being exploited?
CISA added CVE-2016-6277 to the Known Exploited Vulnerabilities catalog on 2022-03-07, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2022-09-07 under BOD 22-01. Weaponised exploit code for CVE-2016-6277 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (http/cves/2016/CVE-2016-6277.yaml). It currently carries a trending score of 50 in the Threadlinqs vulnerability feed.
- trickest/cve (trickest)
Affected products and versions
No affected-product or package list has been recorded for CVE-2016-6277 in the tracked sources. The vendor advisory and the references below are the authoritative statement of what is affected.
How to fix CVE-2016-6277
Because CVE-2016-6277 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2022-09-07. No vendor patch reference has been recorded for CVE-2016-6277 in the tracked sources. Follow the references below for a fix, and treat any affected deployment as exposed until the vendor states otherwise.
Threat activity tracking CVE-2016-6277
1 tracked threat in the Threadlinqs corpus references CVE-2016-6277, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on .