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NVD / CVE Program· CNA mitre

CVE-2021-45511: Certain NETGEAR devices are affected by authentication bypass.

CriticalCVSS 9.8 · v3.1—Weaponized No fix recorded

Noroxi assessment

Priority: This week (action score 60/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • A ready-made attack tool exists and the flaw can be exploited over the network without an account, so priority is at least “This week”.
  • Probability of exploitation in the next 30 days: 18.8% (FIRST EPSS); higher than 97.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.
  • Severity is disputed: the assigning authority (CNA) scores it 6.8, NVD 9.8.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Certain NETGEAR devices are affected by authentication bypass. This affects AC2100 before 2021-08-27, AC2400 before 2021-08-27, AC2600 before 2021-08-27, D7000 before 2021-08-27, R6220 before 2021-08-27, R6230 before 2021-08-27, R6260 before 2021-08-27, R6330 before 2021-08-27, R6350 before 2021-08-27, R6700v2 before 2021-08-27, R6800 before 2021-08-27, R6850 before 2021-08-27, R6900v2 before 2021-08-27, R7200 before 2021-08-27, R7350 before 2021-08-27, R7400 before 2021-08-27, and R7450 before 2021-08-27.

Published
Dec 25, 2021
Updated
Jun 17, 2026
EPSS
18.8% · 97th percentile
CWE
—

Report tools

JSON

Action score

60

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
6 / 30 · 18.8%
Ready-made attack tool
15 / 60 · floor: at least 60

CNA vs NVD score

NVD
9.8
CNA · mitre
6.8
3.0 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2021-45511

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
netgearac2100 firmware
netgearac2100
netgearac2400 firmware
netgearac2400
netgearac2600 firmware
netgearac2600
netgeard7000 firmware
netgeard7000
netgearr6220 firmware
netgearr6220
netgearr6230 firmware
netgearr6230

and 22 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • netgear ac2100 firmwarebefore 1.2.0.88
  • netgear ac2400 firmwarebefore 1.2.0.88
  • netgear ac2600 firmwarebefore 1.2.0.88
  • netgear d7000 firmwarebefore 1.0.1.80
  • netgear r6220 firmwarebefore 1.1.0.110
  • netgear r6230 firmwarebefore 1.1.0.110
  • netgear r6260 firmwarebefore 1.1.0.84
  • netgear r6330 firmwarebefore 1.1.0.84
+9 more rows
  • netgear r6350 firmwarebefore 1.1.0.84
  • netgear r6700v2 firmwarebefore 1.2.0.88
  • netgear r6800 firmwarebefore 1.2.0.88
  • netgear r6850 firmwarebefore 1.1.0.84
  • netgear r6900v2 firmwarebefore 1.2.0.88
  • netgear r7200 firmwarebefore 1.2.0.88
  • netgear r7350 firmwarebefore 1.2.0.88
  • netgear r7400 firmwarebefore 1.2.0.88
  • netgear r7450 firmwarebefore 1.2.0.88

Same product

netgear: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-45644Certain NETGEAR devices are affected by incorrect configuration of security settings.
    39Monitor
  • CVE-2020-35795Certain NETGEAR devices are affected by a buffer overflow by an unauthenticated attacker.
    39Monitor
  • CVE-2020-26927Certain NETGEAR devices are affected by authentication bypass.
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2020-27866Feb 11, 2021 · This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120…
    38Monitor
  • ← EarlierCVE-2020-27867Feb 11, 2021 · This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120…
    28Monitor
  • Later →CVE-2021-45534Dec 25, 2021 · Certain NETGEAR devices are affected by command injection by an authenticated user.
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Metasploit moduleauxiliary/admin/http/netgear_pnpx_getsharefolderlist_auth_bypassNetgear PNPX_GetShareFolderList Authentication Bypassauxiliary2021-09-06

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-111 d
  2. Published
  3. TodayNov 12, 2026+1783 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2021-455340 days apartCertain NETGEAR devices are affected by command injection by an authenticated user.
    31Monitor

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records