PatchTheCVECVE-2026-19977: A vulnerability was detected in EFM ipTIME A3004T 14.19.0
CVE-2026-19977 is a critical-severity flaw (CVSS 10.0) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- CISA SSVC: public proof of concept
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 10.0 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.3% (top 29%) |
| CISA exploited list | No |
| Weakness | CWE-287 |
| Published | 2026-08-17 |
| Last modified | 2026-08-20 |
Last updated 2026-08-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-19977?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-19977 being exploited?
CVE-2026-19977 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-19977 affect?
CVE-2026-19977 affects affected software. Severity is critical (CVSS 10.0). 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
How urgent is CVE-2026-19977?
Priority 64/100. Critical severity; CISA SSVC: public proof of concept; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action