CVE-2021-44769Network attack vector

Factory-reset DoS via malformed certificate input

Published Oct 24, 2022 · Updated May 7, 2025

Improper input validation in Lanner IAC-AST2500A firmware 1.10.0 allows remote authenticated users to cause a denial of service via TLS certificate generation. The certificate-generation function accepts malformed input that puts the BMC into a denial-of-service state requiring factory reset for recovery. Access to the remote management interface and sufficient privileges are required, and the documented consequence is service interruption without confidentiality or integrity impact.

CVSS severity6.5
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Lanner IAC-AST2500A firmware 1.10.0 allows remote authenticated users to cause a denial of service via TLS certificate generation. The certificate-generation function accepts malformed input that puts the BMC into a denial-of-service state requiring factory reset for recovery. Access to the remote management interface and sufficient privileges are required, and the documented consequence is service interruption without confidentiality or integrity impact.

The record

CVE
CVE-2021-44769
Published
Oct 24, 2022
Updated
May 7, 2025
Vendor
Lanner Electronics Inc
Product
IAC-AST2500A
Classifications
CWE-20, T1499
Attack vector
network
Privileges
authenticated

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?

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

  1. Affected versionversion=1.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Lanner Electronics Inc · IAC-AST2500Aversion=1.10.0

Published CVSS scores

6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.9Nozomi NetworksCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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