CVE-2023-50920Public exploit

Authentication bypass via predictable post-reboot session IDs

Published Jan 12, 2024 · Updated Jun 17, 2025

Session fixation in affected GL.iNet routers running firmware 4.x allows local users to bypass authentication and perform unauthorized actions. The local web login generates session identifiers from a repeatable seed sequence after every reboot, making previously observed identifiers predictable. Local low-privileged access and observation of login-generated seeds are required; a valid predicted identifier permits user impersonation and unauthorized state changes.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session fixation in affected GL.iNet routers running firmware 4.x allows local users to bypass authentication and perform unauthorized actions. The local web login generates session identifiers from a repeatable seed sequence after every reboot, making previously observed identifiers predictable. Local low-privileged access and observation of login-generated seeds are required; a valid predicted identifier permits user impersonation and unauthorized state changes.

The record

CVE
CVE-2023-50920
Published
Jan 12, 2024
Updated
Jun 17, 2025
Vendor
GL.iNet
Product
AXT1800
Classifications
CWE-384, T1539
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.4.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

GL.iNet · AXT1800version=4.4.6
GL.iNet · AX1800version=4.4.6
GL.iNet · MT6000version=4.5.0
GL.iNet · GL-AR300M Shadowversion=4.3.7
GL.iNet · GL-B1300 Convexa-Bversion=4.3.7
GL.iNet · GL-MT300N-V2 Mangoversion=4.3.7
GL.iNet · A1300version=4.4.6
GL.iNet · GL-AR750 Cretaversion=4.3.7
GL.iNet · MT2500version=4.4.6
GL.iNet · GL-MT1300 Berylversion=4.3.7
GL.iNet · MT3000version=4.4.6
GL.iNet · GL-AR750S Slateversion=4.3.7

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-384Session Fixation
T1539Steal Web 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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