CVE-2021-36708Public exploitNetwork attack vector

Unauthenticated admin password reset via exposed setup handler

Published Aug 6, 2021 · Updated Aug 4, 2024

Authentication bypass in ProLink PRC2402M 1.0.18 and earlier allows remote attackers to reset the router administrator password. The unauthenticated login.cgi sysinit route passes the attacker-controlled newpass value to set_sys_init, which stores it as the NVRAM Password. Network access to the HTTP management interface is sufficient, and the reset grants administrative access while leaving most router settings intact.

CVSS severity7.5
High
EPSS probability1.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in ProLink PRC2402M 1.0.18 and earlier allows remote attackers to reset the router administrator password. The unauthenticated login.cgi sysinit route passes the attacker-controlled newpass value to set_sys_init, which stores it as the NVRAM Password. Network access to the HTTP management interface is sufficient, and the reset grants administrative access while leaving most router settings intact.

The record

CVE
CVE-2021-36708
Published
Aug 6, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-640, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-640Weak Password Recovery Mechanism for Forgotten Password
T1098Account Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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