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CVE-2018-21117

26
FAUCET Score

CVE-2018-21117 describes a remote code execution vulnerability affecting NETGEAR XR500 devices running firmware versions prior to 2.3.2.32, stemming from an issue within the traceroute handler. 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 complete compromise of confidentiality, integrity, and availability without requiring authentication. While no public exploits, Metasploit modules, or Nuclei templates are available, and there is no evidence of active exploitation or significant community discussion, the inherent severity warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.3.2.32CPE matchmatch criteria
cpe:2.3:o:netgear:xr500_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
1.05%
Probability of exploitation in next 30 days
EPSS Percentile
60.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0105 is in the 75th 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 / 000060241/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-XR500-PSV-2018-0313
Vendor Advisory