CVE-2026-80154

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: HIGH) published 2026-09-22. a secondary CVSS source baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.6Exploit: None knownExposed: 0

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

All firmware versions of Lantronix SLC8000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02 contain an authentication bypass vulnerability in the web management portal that allows unauthenticated attackers to derive valid session tokens of logged-in users and bypass source IP and User-Agent validation. Session tokens are generated deterministically from the device model and the current time at one-second resolution, resulting in a small enumerable set of possible active tokens. Attackers can construct a crafted URI that exploits file extension handling in the web server path routing to bypass per-session source-address validation, then use a derived token from a different source address to gain elevated privileges on the affected device and potentially impact downstream serial-attached devices.

CVSS v3
9.6
EG Score
9.6(high)
EG Risk
43(Track)
EG Risk 43/100SSVC: Track

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
Severity96% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

September 22, 2026

Last Modified

September 22, 2026

Advisory Details (2)

Auto-updated Sep 22, 2026
No patch confirmed yet.
generic

Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-predictable-session-token-with-validation-bypass
generic

REVRB-LANTERN: Security Research on Lantronix Autonomous Out-of-Band Devices | RE/VRb LLC

https://revrb.net/2026/09/21/revrb-lantern.html

Vendor Advisories for CVE-2026-80154(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 17× in last 7d / 17× 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. 2026-09-24 02:53 UTCGHSA enrichment
  2. 2026-09-23 23:09 UTCGHSA enrichment
  3. 2026-09-23 19:06 UTCEG score recompute
  4. 2026-09-23 19:06 UTCGHSA enrichment
  5. 2026-09-23 17:54 UTCEPSS rescore
  6. 2026-09-23 15:15 UTCGHSA enrichment
  7. 2026-09-23 11:30 UTCGHSA enrichment
  8. 2026-09-23 07:46 UTCGHSA enrichment
  9. 2026-09-23 04:01 UTCGHSA enrichment
  10. 2026-09-23 00:17 UTCGHSA enrichment
  11. 2026-09-22 20:33 UTCEG score recompute
  12. 2026-09-22 20:33 UTCGHSA enrichment
  13. 2026-09-22 18:33 UTCEG score recompute
  14. 2026-09-22 17:48 UTCEG score recompute
  15. 2026-09-22 16:19 UTCEG score recompute
  16. 2026-09-22 15:30 UTCEG score recompute
  17. 2026-09-22 15:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-80154?
CVE-2026-80154 is a critical vulnerability published on September 22, 2026. All firmware versions of Lantronix SLC8000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02 contain an authentication bypass vulnerability in the web management portal that allows unauthenticated attackers to derive valid session tokens of logged-in users and bypass source IP and User-Agent…
When was CVE-2026-80154 disclosed?
CVE-2026-80154 was first published in the National Vulnerability Database on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80154 actively exploited?
CVE-2026-80154 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 51.3% of all scored CVEs.
What is the CVSS score of CVE-2026-80154?
CVE-2026-80154 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-80154?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80154, 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

Explore the affected products and dependency analysis for CVE-2026-80154

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