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CVE-2021-45527

29
FAUCET Score

CVE-2021-45527 describes a critical buffer overflow vulnerability affecting numerous NETGEAR router and extender models, allowing an authenticated user to potentially execute arbitrary code or cause a denial of service. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity, leading to high impacts on confidentiality, integrity, and availability. Despite its severity, there is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbk752_firmware:*:*:*:*:*:*:*:*
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbr750_firmware:*:*:*:*:*:*:*:*
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbs750_firmware:*:*:*:*:*:*:*:*
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbk852_firmware:*:*:*:*:*:*:*:*
< 3.2.17.12CPE matchmatch criteria
cpe:2.3:o:netgear:rbr850_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
1.13%
Probability of exploitation in next 30 days
EPSS Percentile
63.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0113 is in the 49th percentile among its peer group of 36,862 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 / 000064493/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Routers-Extenders-and-WiFi-Systems-PSV-2020-0437
PatchVendor Advisory