Auth bypass in Efm Iptime A3004t
CVE-2026-19977
A vulnerability was detected in EFM ipTIME A3004T 14.19.0. The affected element is the function httpcon_check_session_url of the component Session Validation. Performing a manipulation results in improper authentication. Remote exploitation of the attack is possible. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Broken Authentication
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Efm Iptime A3004t — versions 14.19.0
Weakness classification (CWE)
References
- cna@vuldb.com (issue-tracking, exploit)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-19977?
- CVE-2026-19977 is a critical-severity vulnerability in Efm Iptime A3004t, classified under Improper Authentication. CVSS score: 10.0/10. Published 2026-08-17.
- How severe is CVE-2026-19977?
- Critical severity. CVSS v3 base score is 10.0 out of 10.