CVE-2026-24455
Published: 20 February 2026
Summary
CVE-2026-24455 is a high-severity Cleartext Transmission of Sensitive Information (CWE-319) vulnerability in Cisa (inferred from references). Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Network Sniffing (T1040); ranked at the 9.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Role-based training covers secure transmission methods, mitigating cleartext transmission of sensitive data.
By requiring documented security controls for information exchanges, the control reduces the risk of cleartext transmission of sensitive data.
Mapping transmission actions in data flows helps prevent cleartext transmission of sensitive information.
Settings can enforce secure transmission protocols to prevent cleartext transmission of sensitive data.
Policy addresses secure transport and handling of media to avoid cleartext transmission of sensitive information.
Enforces safeguards against cleartext transmission of CUI when data leaves organizational boundaries to external systems.
Explicit controls and continuous oversight on external system services prevent cleartext transmission of sensitive information over provider-managed channels.
Key-establishment procedures specify secure distribution channels that preclude cleartext transmission of key material.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Cleartext HTTP Basic Auth directly enables passive credential capture via network sniffing (T1040); captured credentials then facilitate unauthorized access via valid accounts (T1078).
NVD Description
The embedded web interface of the device does not support HTTPS/TLS for authentication and uses HTTP Basic Authentication. Traffic is encoded but not encrypted, exposing user credentials to passive interception by attackers on the same network.
Deeper analysisAI
CVE-2026-24455 is a vulnerability in the embedded web interface of the device, where authentication relies on HTTP Basic Authentication without support for HTTPS/TLS. This configuration results in traffic that is encoded but not encrypted, exposing user credentials to passive interception. The flaw is cataloged under CWE-319 (Cleartext Transmission of Sensitive Information) and carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), indicating high severity due to network accessibility and significant confidentiality impact.
Attackers with access to the same network as the device can exploit this vulnerability through passive network interception, such as via packet sniffing, to capture transmitted credentials without requiring privileges, user interaction, or active disruption. Successful exploitation enables unauthorized access to the web interface using stolen credentials, potentially leading to further compromise depending on the device's privileges and functions.
The CISA ICS advisory ICSA-26-050-03 addresses this vulnerability, with full details available at https://www.cisagov.github.io/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-050-03.json and https://www.cisa.gov/news-events/ics-advisories/icsa-26-050-03. Practitioners should consult these sources for recommended mitigations, such as applying patches or network segmentation if available.
Details
- CWE(s)