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CVE-2021-45611

31
FAUCET Score

CVE-2021-45611 is a critical buffer overflow vulnerability affecting multiple NETGEAR router models, including the DC112A, R6400, and RAX200, among others. This flaw allows an unauthenticated attacker to execute arbitrary code with high impact on confidentiality, integrity, and availability. Rated 9.8 CRITICAL on the CVSS scale, it presents a significant risk due to its network-based attack vector and low attack complexity. While there is no evidence of active exploitation in the wild and no public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered considerable community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.0.52CPE matchmatch criteria
cpe:2.3:o:netgear:dc112a_firmware:*:*:*:*:*:*:*:*
< 1.0.1.68CPE matchmatch criteria
cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
< 1.0.2.144CPE matchmatch criteria
cpe:2.3:o:netgear:r8300_firmware:*:*:*:*:*:*:*:*
< 1.0.2.144CPE matchmatch criteria
cpe:2.3:o:netgear:r8500_firmware:*:*:*:*:*:*:*:*
< 1.0.1.38CPE matchmatch criteria
cpe:2.3:o:netgear:wndr3400v3_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.20%
Probability of exploitation in next 30 days
EPSS Percentile
65.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0120 is in the 51st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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 / 000064488/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2020-0323
PatchVendor Advisory