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No exploitation reportedFix available

CVE-2021-34865

No exploitation reported by the sources we read.

  • Published2022-01-25
  • Fixed in1.2.0.88
  • WeaknessCWE-287 · CWE-697

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.

Timeline

dates in UTC
  1. 2022-01-2516:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-34865?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-34865?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Netgear ac2100 firmwareversion to verify
BranchAffectedFixed in
1.2< 1.2.0.881.2.0.88
Netgear ac2400 firmwareversion to verify
BranchAffectedFixed in
1.2< 1.2.0.881.2.0.88
Netgear ac2600 firmwareversion to verify
BranchAffectedFixed in
1.2< 1.2.0.881.2.0.88

14 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. Update Netgear ac2100 firmware to 1.2.0.88

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.18.8read 2026-10-23
  • CNACVSS 3.08.8read 2026-10-23
  • NVDCVSS 2.08.3read 2026-10-23
  • CNAweakness (CWE)CWE-287read 2026-10-23
  • NVDweakness (CWE)CWE-697read 2026-10-23
  • FIRST EPSSEPSS score3.1 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-01-25
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-34865?

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.

Is CVE-2021-34865 actively exploited?

Active exploitation of CVE-2021-34865 has not been confirmed. Its EPSS score was 3.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-34865?

CVE-2021-34865 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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