CVE-2021-46010Public exploitNetwork attack vector

Authenticated session hijacking via timestamp-derived identifiers

Published Mar 30, 2022 · Updated Jul 9, 2026

Authentication bypass in Totolink A3100R 5.9c.4577 allows remote authenticated users to hijack a valid web-management session. The web configuration constructs SESSION_ID as 2::2, exposing a small, time-derived token space instead of an unpredictable identifier. A valid session must exist, and successful timestamp brute forcing grants that session's management privileges and configuration capabilities.

CVSS severity8.8
High
EPSS probability1.24%
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 Totolink A3100R 5.9c.4577 allows remote authenticated users to hijack a valid web-management session. The web configuration constructs SESSION_ID as 2::2, exposing a small, time-derived token space instead of an unpredictable identifier. A valid session must exist, and successful timestamp brute forcing grants that session's management privileges and configuration capabilities.

The record

CVE
CVE-2021-46010
Published
Mar 30, 2022
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-330, T1550.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 30, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-330Use of Insufficiently Random Values
T1550.004Web Session Cookie

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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