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CVE-2018-21170

27
FAUCET Score

CVE-2018-21170 describes a stack-based buffer overflow vulnerability in specific NETGEAR devices, including models like the EX2700, R7800, WN2000RPTv3, WN3000RPv3, and WN3100RPv2, affecting firmware versions prior to their respective patches. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk due to its network-adjacent attack vector, low attack complexity, and potential for high impact on confidentiality, integrity, and availability. An unauthenticated attacker can exploit this flaw. Currently, there is no evidence of active exploitation, nor are there publicly available exploit modules in common frameworks like Metasploit or Nuclei, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.2.40CPE matchmatch criteria
cpe:2.3:o:netgear:r7800_firmware:*:*:*:*:*:*:*:*
< 1.0.1.28CPE matchmatch criteria
cpe:2.3:o:netgear:ex2700_firmware:*:*:*:*:*:*:*:*
< 1.0.1.20CPE matchmatch criteria
cpe:2.3:o:netgear:wn2000rpt_firmware:*:*:*:*:*:*:*:*
< 1.0.2.50CPE matchmatch criteria
cpe:2.3:o:netgear:wn3000rp_firmware:*:*:*:*:*:*:*:*
< 1.0.0.56CPE matchmatch criteria
cpe:2.3:o:netgear:wn3100rp_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.73%
Probability of exploitation in next 30 days
EPSS Percentile
50.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0073 is in the 55th percentile among its peer group of 1,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

kb.netgear.com / 000055188/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-Some-Routers-and-Extenders-PSV-2017-2638
Vendor Advisory