What’s Vulnerable › Vulnerabilities

CVE-2025-41082: HTTP Request/Response Smuggling in Altitude Communication Server

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-26 · updated 2026-06-17
• Weakness: CWE-444

Description

Illegal HTTP request traffic vulnerability (CL.0) in Altitude Communication Server, caused by inconsistent analysis of multiple HTTP requests over a single Keep-Alive connection using Content-Length headers. This can cause a desynchronization of requests between frontend and backend servers, which could allow request hiding, cache poisoning or security bypass.

Affected products

• Altitude Communication Server: all versions

References

• https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-altitude-communication-server

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