CVE-2021-45507 Vulnerability Analysis & Exploit Details

CVE-2021-45507
Vulnerability Scoring

9.6
/10
Critical Risk

As a catastrophic security flaw, CVE-2021-45507 has severe implications, demanding immediate intervention.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Adjacent_network
    Attack Vector Under Analysis
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Changed
    Successful exploitation can impact components beyond the vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2021-45507 Details

Status: Modified

Last updated: 🕓 17 Jun 2026, 04:13 UTC
Originally published on: 🕐 26 Dec 2021, 01:15 UTC

Time between publication and last update: 1634 days

CVSS Release: version 3

CVSS3 Source

cve@mitre.org

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2021-45507 Vulnerability Summary

CVE-2021-45507: Certain NETGEAR devices are affected by authentication bypass. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBW30 before 2.6.2.2, RBK752 before 3.2.17.12, RBR750 before 3.2.17.12, RBS750 before 3.2.17.12, RBK852 before 3.2.17.12, RBR850 before 3.2.17.12, RBS850 before 3.2.17.12, and RBS40V before 2.6.2.8.

Assessing the Risk of CVE-2021-45507

Access Complexity Graph

The exploitability of CVE-2021-45507 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2021-45507

With low attack complexity and no required privileges, CVE-2021-45507 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2021-45507, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2021-45507, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2021-45507 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2021-45507 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: High
    CVE-2021-45507 can disrupt system operations, potentially causing complete denial of service (DoS).

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.284% (probability of exploit)

EPSS Percentile: 68.91% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 31.090000000000003% of others.

CVE-2021-45507 References

External References

CWE Common Weakness Enumeration

NVD-CWE-noinfo

Vulnerable Configurations

  • cpe:2.3:o:netgear:cbr40_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:cbr40_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:cbr40_firmware:2.3.5.12:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:cbr40_firmware:2.3.5.12:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:cbr40_firmware:2.5.0.10:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:cbr40_firmware:2.5.0.10:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:cbr40_firmware:2.5.0.14:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:cbr40_firmware:2.5.0.14:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:cbr40:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:cbr40:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:cbr750_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:cbr750_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:cbr750_firmware:3.2.16.9:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:cbr750_firmware:3.2.16.9:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:cbr750_firmware:3.2.16.18:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:cbr750_firmware:3.2.16.18:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:cbr750_firmware:3.2.18.2:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:cbr750_firmware:3.2.18.2:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:cbr750:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:cbr750:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbw30_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbw30_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbw30_firmware:2.1.2.6:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbw30_firmware:2.1.2.6:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbw30_firmware:2.1.4.16:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbw30_firmware:2.1.4.16:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbw30_firmware:2.2.1.204:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbw30_firmware:2.2.1.204:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbw30_firmware:2.5.0.4:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbw30_firmware:2.5.0.4:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbw30_firmware:2.6.1.4:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbw30_firmware:2.6.1.4:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:rbw30:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:rbw30:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk752_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk752_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk752_firmware:3.2.10.10:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk752_firmware:3.2.10.10:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk752_firmware:3.2.15.25:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk752_firmware:3.2.15.25:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk752_firmware:3.2.16.6:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk752_firmware:3.2.16.6:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk752_firmware:3.2.16.22:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk752_firmware:3.2.16.22:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:rbk752:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:rbk752:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr750_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr750_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr750_firmware:3.2.10.10:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr750_firmware:3.2.10.10:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr750_firmware:3.2.15.25:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr750_firmware:3.2.15.25:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr750_firmware:3.2.16.6:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr750_firmware:3.2.16.6:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr750_firmware:3.2.16.22:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr750_firmware:3.2.16.22:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:rbr750:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:rbr750:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs750_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs750_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs750_firmware:3.2.10.10:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs750_firmware:3.2.10.10:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs750_firmware:3.2.15.25:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs750_firmware:3.2.15.25:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs750_firmware:3.2.16.6:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs750_firmware:3.2.16.6:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs750_firmware:3.2.16.22:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs750_firmware:3.2.16.22:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:rbs750:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:rbs750:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk852_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk852_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk852_firmware:3.2.10.11:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk852_firmware:3.2.10.11:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk852_firmware:3.2.15.25:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk852_firmware:3.2.15.25:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk852_firmware:3.2.16.6:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk852_firmware:3.2.16.6:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbk852_firmware:3.2.16.22:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbk852_firmware:3.2.16.22:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:rbk852:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:rbk852:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.1.5.23:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.1.5.23:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.2.7.2:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.2.7.2:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.2.8.5:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.2.8.5:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.2.9.2:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.2.9.2:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.2.10.11:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.2.10.11:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.2.11.2:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.2.11.2:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.2.15.25:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.2.15.25:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.2.16.6:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.2.16.6:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbr850_firmware:3.2.16.22:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbr850_firmware:3.2.16.22:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:rbr850:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:rbr850:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.1.5.23:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.1.5.23:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.2.7.2:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.2.7.2:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.2.8.5:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.2.8.5:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.2.9.2:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.2.9.2:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.2.10.11:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.2.10.11:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.2.11.2:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.2.11.2:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.2.15.25:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.2.15.25:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.2.16.6:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.2.16.6:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs850_firmware:3.2.16.22:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs850_firmware:3.2.16.22:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:rbs850:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:rbs850:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs40v_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs40v_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs40v_firmware:2.2.0.58:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs40v_firmware:2.2.0.58:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs40v_firmware:2.5.1.6:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs40v_firmware:2.5.1.6:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs40v_firmware:2.6.1.4:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs40v_firmware:2.6.1.4:*:*:*:*:*:*:*
  • cpe:2.3:o:netgear:rbs40v_firmware:2.6.2.4:*:*:*:*:*:*:*
    cpe:2.3:o:netgear:rbs40v_firmware:2.6.2.4:*:*:*:*:*:*:*
  • cpe:2.3:h:netgear:rbs40v:-:*:*:*:*:*:*:*
    cpe:2.3:h:netgear:rbs40v:-:*:*:*:*:*:*:*

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