Is CVE-2021-26727 actively exploited?

No active exploitation of CVE-2021-26727 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-26727 be exploited remotely?

Yes. CVE-2021-26727 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-26727?

CVE-2021-26727 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-26727

CWE-94Published: October 24, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Multiple command injections and stack-based buffer overflows vulnerabilities in the SubNet_handler_func function of spx_restservice allow an attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.

NVD Source

Risk Analysis

This flaw consists of multiple command injection and buffer overflow vulnerabilities in the spx_restservice component, potentially allowing an attacker to achieve root-level code execution. The critical 9.8 CVSS score highlights the high impact of this vulnerability on the affected device.

No public exploit is known for this issue, and it is not tracked in the CISA KEV. The vulnerability is remotely exploitable with low attack complexity.

Recommended Action

Apply firmware updates for Lanner Inc IAC-AST2500A beyond version 1.10.0 to remediate the vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-26727 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.