8.8

CVE-2021-34865: netgear ac2100_firmware Improper Authentication

CVSS: 8.8v3.0HighModified
Published 25-01-2022Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-34865 is a high (CVSS 8.8) Improper Authentication vulnerability in netgear ac2100_firmware. EPSS estimates a 3.08% chance of exploitation in the next 30 days, higher than 87.4% of scored vulnerabilities.

Overall risk
36/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.0 (CVE.org)
EPSS score
3.08%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-01-2022
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

3.08%

Chance of exploitation in the next 30 days

Percentile

87%

Versus all other CVEs

30-day change

0.00 pp

From 3.08% on 18-09-2026

18-09-202618-10-2026
EPSS score
3.08%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Netgear18 products

1 vendor · 18 products

References

2 links