CVE-2017-6862
CVE-2017-6862 is a security flaw in NETGEAR Multiple Devices, routers for homes and small offices. Attackers can run their own code on NETGEAR Multiple Devices. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 8 Jun 2022.[1]
NETGEAR Multiple Devices is in things households have: home and small-office routers, so the fix matters at home as much as at work. NETGEAR has published a fix or advice.
Description
CISA calls it a buffer overflow in NETGEAR Multiple Devices. In its words: “Multiple NETGEAR devices contain a buffer overflow vulnerability that allows for authentication bypass and remote code execution.”[1]
The CVE record adds: “NETGEAR WNR2000v3 devices before 1.1.2.14, WNR2000v4 devices before 1.0.0.66, and WNR2000v5 devices before 1.0.0.42 allow authentication bypass and remote code execution via a buffer overflow that uses a parameter in the administration webapp. The NETGEAR ID is PSV-2016-0261.”[2]
The underlying weakness is memory buffer error (CWE-119), in MITRE’s list of common software weaknesses.
It scores 9.8 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it; NETGEAR’s advisory has them[3]. CISA names the product as NETGEAR Multiple Devices.
Every device with NETGEAR Multiple Devices needs the update.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 8 Jun 2022, 1,839 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 22 Jun 2022 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 46%. That’s in the top 2% of the flaws it scores.[4]
CISA assesses it as automatable: attackers can run it against many targets at once.
CISA doesn’t say who was attacked, or how.
Fix
NETGEAR has published a fix or advice.[3] CISA’s required action: “Apply updates per vendor instructions.”[1]
- Update NETGEAR Multiple Devices now.Open the router’s app, or its admin page in a browser, and look for a firmware update. Then turn on automatic updates, so the next fix arrives on its own.
- If the maker has stopped updating it, replace it.Routers stop getting fixes after a few years, and attackers keep a list of the ones that did. If there’s no newer firmware, it won’t be fixed.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 9.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 46%.[4] |
See also
Other NETGEAR Multiple Devices flaws
- CVE-2017-5521: exposure of sensitive information ·
Other NETGEAR flaws
- CVE-2017-6334, NETGEAR DGN2200 Devices: OS command injection ·
- CVE-2016-1555, NETGEAR Wireless Access Point (WAP) Devices: multiple WAP devices command injection ·
- CVE-2016-10174, NETGEAR WNR2000v5 Router: buffer overflow ·
- CVE-2017-6077, NETGEAR Wireless Router DGN2200: dGN2200 remote code execution ·
- CVE-2016-6277, NETGEAR Multiple Routers: remote code execution ·
Other memory buffer error flaws
- CVE-2026-88779, Citrix NetScaler: improper restriction of operations within the bounds of a memory buffer ·
- CVE-2026-88772, Citrix NetScaler: improper restriction of operations within the bounds of a memory buffer ·
- CVE-2026-88771, Citrix NetScaler: improper input validation ·
- CVE-2026-8452, Citrix NetScaler ADC and NetScaler Gateway: improper restriction of operations within the bounds of a memory buffer ·
- CVE-2009-3459, Adobe Acrobat and Reader: heap-based buffer overflow ·
Added the same day
- CVE-2019-7195, QNAP Photo Station: path traversal ·
- CVE-2019-7194, QNAP Photo Station: path traversal ·
- CVE-2019-7193, QNAP QTS: improper input validation ·
- CVE-2019-7192, QNAP Photo Station: improper access control ·
- CVE-2019-5825, Chrome and other Chromium browsers: out-of-bounds write ·
Every NETGEAR flaw on CISA’s list · Everything added in June 2022
References
- ^ Cybersecurity and Infrastructure Security Agency. “NETGEAR Multiple Devices Buffer Overflow Vulnerability”. Known Exploited Vulnerabilities Catalog, added 8 Jun 2022.
- ^ National Institute of Standards and Technology. “CVE-2017-6862 Detail”. National Vulnerability Database, published 26 May 2017.
- ^ NETGEAR. Advisories and fixes: kb.netgear.com.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.457, percentile 98.8, 31 Oct 2026.
- CVE Program. “CVE-2017-6862”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.