CVE-2025-12423 Denial of Service - Protocol Manipulation

What is CVE-2025-12423?

CVE-2025-12423 is a critical denial of service vulnerability in Azure Access Technology BLU-IC2, published on 28 Oct 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Protocol manipulation might lead to denial of service.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5 .

Weakness: CWE-248

Which versions are affected by CVE-2025-12423?

It affects 2 products.

Products include Azure-Access Blu-Ic2 Firmware, Azure-Access Blu-Ic4 Firmware.

How do I fix CVE-2025-12423?

No fix has been published for CVE-2025-12423 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-12423 being exploited?

There is no known exploitation of CVE-2025-12423 in the wild and no public exploit code.

Other vulnerabilities in Azure Access Technology BLU-IC2

• CVE-2025-12599 Multiple Devices are Sharing the Same Secrets for SDKSocket (TCP/5000) Critical 10.0
• CVE-2025-12600 Web UI Malfunction Critical 10.0
• CVE-2025-12601 Denial of Service Due to SlowLoris Critical 10.0
• CVE-2025-12553 Server Certificate Verification Disabled Critical 10.0
• CVE-2025-12515 Systemic Internal Server Errors - HTTP 500 Response Critical 10.0

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-j24q-5p96-5g77.