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CVE-2018-21115

27
FAUCET Score

CVE-2018-21115 is a critical remote code execution vulnerability affecting NETGEAR XR500 devices running firmware versions prior to 2.3.2.32. This flaw allows unauthenticated attackers on the local network to execute arbitrary code with high impact on confidentiality, integrity, and availability. While rated with a high CVSS score of 8.8, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage. Organizations are advised to update affected devices immediately to mitigate this risk.

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
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
58.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 73rd 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 / 000060243/Security-Advisory-for-Pre-Authentication-Stack-Overflow-on-XR500-PSV-2018-0309
Vendor Advisory