CVE-2026-19977

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-17. a secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
10.0
EG Score
10.0(high)
EG Risk
76(Attend)
EG Risk 76/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity100% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Aug 20, 2026
No patch confirmed yet.
generic

The ipTIME A3004T router is vulnerable to authentication bypass and arbitrary password reset exploits · Issue #1 · AdminSafe/CVE · GitHub

https://github.com/AdminSafe/CVE/issues/1

Vendor Advisories for CVE-2026-19977(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 42× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 05:47 UTCGHSA enrichment
  2. 2026-08-21 01:36 UTCEG score recompute
  3. 2026-08-21 01:36 UTCGHSA enrichment
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 21:25 UTCGHSA enrichment
  6. 2026-08-20 17:14 UTCGHSA enrichment
  7. 2026-08-20 13:00 UTCGHSA enrichment
  8. 2026-08-20 09:14 UTCGHSA enrichment
  9. 2026-08-20 05:03 UTCGHSA enrichment
  10. 2026-08-20 00:51 UTCGHSA enrichment
  11. 2026-08-19 20:38 UTCEG score recompute
  12. 2026-08-19 20:38 UTCGHSA enrichment
  13. 2026-08-19 17:03 UTCEPSS rescore
  14. 2026-08-19 16:26 UTCGHSA enrichment
  15. 2026-08-19 12:14 UTCGHSA enrichment
  16. 2026-08-19 08:03 UTCGHSA enrichment
  17. 2026-08-19 03:51 UTCGHSA enrichment
  18. 2026-08-18 23:41 UTCGHSA enrichment
  19. 2026-08-18 19:30 UTCEG score recompute
  20. 2026-08-18 19:30 UTCGHSA enrichment
  21. 2026-08-18 15:18 UTCEG score recompute
  22. 2026-08-18 15:18 UTCGHSA enrichment
  23. 2026-08-18 15:18 UTCNVD updateCVSS v4 → 9.3
  24. 2026-08-18 14:51 UTCEG score recompute
  25. 2026-08-18 14:51 UTCGHSA enrichment
Show 17 more
  1. 2026-08-18 14:29 UTCMITRE cvelistV5CVSS v4 → 10
  2. 2026-08-18 13:48 UTCEPSS rescore
  3. 2026-08-18 13:03 UTCGHSA enrichment
  4. 2026-08-18 08:51 UTCGHSA enrichment
  5. 2026-08-18 04:39 UTCGHSA enrichment
  6. 2026-08-18 00:26 UTCGHSA enrichment
  7. 2026-08-17 20:14 UTCGHSA enrichment
  8. 2026-08-17 16:03 UTCEG score recompute
  9. 2026-08-17 16:03 UTCGHSA enrichment
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-17 11:52 UTCGHSA enrichment
  12. 2026-08-17 07:41 UTCEG score recompute
  13. 2026-08-17 07:41 UTCGHSA enrichment
  14. 2026-08-17 03:30 UTCEG score recompute
  15. 2026-08-17 03:29 UTCNVD updateCVSS v4 → 9.3
  16. 2026-08-17 03:15 UTCEG score recompute
  17. 2026-08-17 03:15 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-19977?
CVE-2026-19977 is a critical vulnerability published on August 17, 2026. A vulnerability was detected in EFM ipTIME A3004T 14.19.0. The affected element is the function httpconchecksession_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…
When was CVE-2026-19977 disclosed?
CVE-2026-19977 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19977 actively exploited?
CVE-2026-19977 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.2% of all scored CVEs.
What is the CVSS score of CVE-2026-19977?
CVE-2026-19977 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-19977?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19977, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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