CVE-2021-26733

Name: CVE-2021-26733
Creator: NVD / NIST
Published: 2022-10-24T14:15:48.423+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2021-26733 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A broken access control vulnerability in the FirstReset_handler_func function of spx_restservice allows an attacker to arbitrarily send reboot commands to the BMC, causing a Denial-of-Service (DoS) condition. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

A broken access control vulnerability in the FirstReset_handler_func function of spx_restservice allows an attacker to arbitrarily send reboot commands to the BMC, causing a Denial-of-Service (DoS) condition. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.65%

46.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Lannerinc	Iac-Ast2500a Firmware	1.10.0

References

https://www.nozominetworks.com/blog/vulnerabilities-in-bmc-firmware-affect-ot-iot-device-security-part-1/Third Party Advisory
https://www.nozominetworks.com/labs/vulnerability-advisories/cve-2021-26733/Third Party Advisory
https://www.nozominetworks.com/blog/vulnerabilities-in-bmc-firmware-affect-ot-iot-device-security-part-1/Third Party Advisory
https://www.nozominetworks.com/labs/vulnerability-advisories/cve-2021-26733/Third Party Advisory

Timeline

Published: Oct 24, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26733?

How severe is CVE-2021-26733?

CVE-2021-26733 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26733?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26733?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST