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CVE detail

CVE-2021-40847

The update process of the Circle Parental Control Service on various NETGEAR routers allows remote attackers to achieve remote code execution as root via a MitM attack. While the parental controls themselves are not enabled by default on the routers, the Circle update daemon, circled, is enabled by default. This daemon connects to Circle and NETGEAR to obtain version information and updates to the circled daemon and its filtering database. However, database updates from NETGEAR are unsigned and downloaded via cleartext HTTP. As such, an attacker with the ability to perform a MitM attack on the device can respond to circled update requests with a crafted, compressed database file, the extraction of which gives the attacker the ability to overwrite executable files with attacker-controlled code. This affects R6400v2 1.0.4.106, R6700 1.0.2.16, R6700v3 1.0.4.106, R6900 1.0.2.16, R6900P 1.3.2.134, R7000 1.0.11.123, R7000P 1.3.2.134, R7850 1.0.5.68, R7900 1.0.4.38, R8000 1.0.4.68, and RS400 1.5.0.68.

CVSS 8.1 · HighBuzz score 27.6

Buzz score

Why this CVE is surfacing

Buzz score total 27.6

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 16.1 · diversity 11.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
16.1
4 evidence mentions in the snapshot
Diversity score
11.5
3 sources across 2 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
4 source links · newest first
  • 27th September – Threat Intelligence ReportCheck Point Research

    For the latest discoveries in cyber research for the week of 27th September, please download our Threat Intelligence Bulletin. Top Attacks and Breaches Conti ransomware gang has hit Covisian’s Spanish and Latin America subsidiary, Europe’s major customer service and call center providers, affecting several of their internal systems. According to the company, there were no […]

    vendorresearch.checkpoint.comSep 26, 2021, 4:36 PM
  • Security Affairs newsletter Round 333Security Affairs

    A new round of the weekly Security Affairs newsletter arrived! Every week the best security articles from Security Affairs free for you in your email box. If you want to also receive for free the international press subscribe here. GSS, one of the major European call center providers, suffered a ransomware attack Threat actors are attempting […]

    newssecurityaffairs.comSep 26, 2021, 8:26 AM
  • CVE-2021-40847 flaw in Netgear SOHO routers could allow remote code executionSecurity Affairs

    CVE-2021-40847 flaw in Netgear SOHO routers could be exploited by a remote attacker to execute arbitrary code as root. Security experts from consulting firm GRIMM have discovered a vulnerability in Small Offices/Home Offices (SOHO) Netgear routers that could be exploited by a remote attacker to execute arbitrary code as root The flaw, tracked as CVE-2021-40847, […]

    newssecurityaffairs.comSep 23, 2021, 6:35 AM
  • Netgear Patches Remote Code Execution Flaw in SOHO RoutersSecurityWeek

    A security vulnerability in Small Offices/Home Offices (SOHO) routers from Netgear could be exploited to execute arbitrary code remotely as root, according to security researchers at consulting firm GRIMM.

    newswww.securityweek.comSep 22, 2021, 5:32 PM

Exploit code

Public exploit repository references

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