CVE-2021-26732Network attack vector

Unauthenticated BMC network reconfiguration via unchecked REST request

Published Oct 24, 2022 · Updated May 7, 2025

Broken access control in spx_restservice on Lanner IAC-AST2500A firmware 1.10.0 allows remote attackers to alter BMC network settings. The First_network_func handler applies attacker-supplied DNS server or gateway values without enforcing authentication. Network access to the BMC web application is sufficient, and changed routing or name-resolution settings can interrupt remote management.

CVSS severity6.5
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken access control in spx_restservice on Lanner IAC-AST2500A firmware 1.10.0 allows remote attackers to alter BMC network settings. The First_network_func handler applies attacker-supplied DNS server or gateway values without enforcing authentication. Network access to the BMC web application is sufficient, and changed routing or name-resolution settings can interrupt remote management.

The record

CVE
CVE-2021-26732
Published
Oct 24, 2022
Updated
May 7, 2025
Vendor
Lanner Electronics Inc
Product
IAC-AST2500A
Classifications
CWE-284, T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 24, 2022CVE publishedPublication date reported by the CVE source.
  2. May 7, 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?

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  1. Affected versionversion=1.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Lanner Electronics Inc · IAC-AST2500Aversion=1.10.0

Published CVSS scores

6.5Nozomi NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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