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CVE-2026-105440 Switch Engine (EXOS) JSON-RPC Authorization Bypass Allows Read-Only Users to Disclose Sensitive Information

8.3 highEPSS 0.4%

High (8.3) in extreme networks switch engine (exos). EPSS 0.4% estimated probability of exploitation activity in the next 30 days.

On this page
Missing authorization in the JSON-RPC web services interface of Extreme Networks Switch Engine (EXOS) allows an authenticated, low-privileged (read-only) user to execute CLI show commands that are restricted to that role through the command line interface. Successful exploitation results in disclosure of sensitive information, including the device configuration and the password hashes of local accounts. Configuration, enable, and debug commands are not affected. Disclosed password hashes can be attacked offline, and a weak password could lead to administrative access to the device. This issue is fixed in Switch Engine 33.7.1-patch1-11, 33.1.100.133-patch1-9, and 32.7.4.15-patch1-11. Extreme Networks would like to thank Toàn Lê (GitHub: https://github.com/toanln-cov) for responsibly disclosing this vulnerability and for working with our PSIRT team through coordinated disclosure.

Severity

CVSS 4.0

8.3 high
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS 3.1

6.5 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
0.4% estimated probability of exploitation activity in the next 30 days; 30th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-862 Missing Authorization
OWASP Top 10
A01:2025 Broken Access Control
Published
Modified
Assigned by
ExtremeNetworks (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • extreme networks:switch engine (exos)

Versions

From the CNA's record in the CVE List.

ProductAffected
Extreme Networks Switch Engine (EXOS)from 33.7.0 before 33.7.1-patch1-11
Extreme Networks Switch Engine (EXOS)from 33.1.0 before 33.1.100-patch1-9
Extreme Networks Switch Engine (EXOS)from 32.0.0 before 32.7.4.15-patch1-11

GitHub PoC (unverified)

Repositories on GitHub named after this CVE. Nobody has checked them and they are not scanned: some hold a working proof of concept, some nothing useful, and some malware made to look like one. Read the code before you run any of it.

  • toanln-cov/CVE-2026-105440 0 stars, created
    Broken Access Control via JSON-RPC API — Privilege Escalation to Admin Credentials

Attack patterns (CAPEC)

  • CAPEC-665 Exploitation of Thunderbolt Protection Flaws Likelihood: Low · Severity: Very High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

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