Improper Authentication in EFM ipTIME A3004T by EFM Networks
CVE-2026-19977

10CRITICAL

Key Information:

Vendor

Efm

Status
Iptime A3004t
Vendor
CVE Published:
17 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-19977?

A vulnerability has been identified in the EFM ipTIME A3004T router, specifically within the httpcon_check_session_url function associated with session validation. This flaw enables improper authentication, which could allow attackers to exploit the system remotely. The vulnerability has been made public, and attempts to notify the vendor regarding this issue went unacknowledged. Users are advised to take precautionary measures to secure their devices against potential exploitation.

Affected Version(s)

ipTIME A3004T 14.19.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-19977 - Proof of Concept

References

https://vuldb.com/vuln/391156
vdb-entrytechnical-description
https://vuldb.com/vuln/391156/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19977
third-party-advisory

CVSS V4

Score:
10
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

010hex (VulDB User)
VulDB CNA Team
.