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CVE-2026-19977

Authentication bypass

10.0 CRITICALEPSS 1.33%
  1. Published17 Aug 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-19977 being actively exploited?

CVE-2026-19977 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.33%.

How severe is CVE-2026-19977?

CVE-2026-19977 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 1.33% probability of exploitation.

How do I fix CVE-2026-19977?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-19977 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.