PHPNuxBill through 2025.3.20 contains an authentication bypass vulnerability in RADIUS CHAP verification because Password::chap_verify() returns true when the supplied response does not match. Attackers who know a valid customer or PPPoE username can log in through MikroTik hotspot or PPPoE CHAP with any incorrect password to obtain network access and consume that customer's plan.
CVE-2026-108108
HIGHPre-NVD 7.17.1—Trending — 3 sources updated this week
EchelonGraph scoreHIGH confidence
Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-10-09. A secondary CVSS source baseline 7.1; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
7.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: —CVSS: 7.1Exploit: None knownExposed services: Not assessed
No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.
- CVSS v3
- 7.1
- EG Score
- 7.1HIGHhigh confidence
- EG Risk
- 36EG Risk 36/100CISA SSVC
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 computedSeverity71% × 45%Exploitation0% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix. - EPSS PROB
- —
- EPSS %ILE
- —
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).
No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 9, 2026
Last Modified
October 9, 2026
Advisory Details (4)
Auto-updated Oct 9, 2026No fix on record yet. Sources: github.
generic
PHPNuxBill through 2025.3.20 CHAP Authentication Bypass via Password::chap_verify() | Advisories | VulnCheck
https://www.vulncheck.com/advisories/phpnuxbill-through-2025.3.20-chap-authentication-bypass-via-password-chap-verifygeneric
GitHub - hotspotbilling/phpnuxbill: PHP Mikrotik Billing - Voucher management for Mikrotik Hotspot · GitHub
https://github.com/hotspotbilling/phpnuxbillgeneric
phpnuxbill/system/autoload/Password.php at 2025.3.13 · hotspotbilling/phpnuxbill · GitHub
https://github.com/hotspotbilling/phpnuxbill/blob/2025.3.13/system/autoload/Password.php#L48githubMentions a patch (unverified)
CHAP Authentication Bypass in radius.php Due to Inverted Comparison Logic · Advisory · hotspotbilling/phpnuxbill · GitHub
https://github.com/hotspotbilling/phpnuxbill/security/advisories/GHSA-6f62-x25v-9686Vendor Advisories for CVE-2026-108108(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 5× in last 7d / 5× 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.
- 2026-10-09 16:53 UTCGHSA enrichment
- 2026-10-09 15:32 UTCEG score recompute
- 2026-10-09 15:32 UTCGHSA enrichment
- 2026-10-09 14:46 UTCEG score recompute
- 2026-10-09 14:43 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(4)
What is CVE-2026-108108?
CVE-2026-108108 is a high vulnerability published on October 9, 2026. PHPNuxBill through 2025.3.20 contains an authentication bypass vulnerability in RADIUS CHAP verification because Password::chap_verify() returns true when the supplied response does not match. Attackers who know a valid customer or PPPoE username can log in through MikroTik hotspot or PPPoE CHAP…
When was CVE-2026-108108 disclosed?
CVE-2026-108108 was first published on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-108108?
CVE-2026-108108 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-108108?
No fix for CVE-2026-108108 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-108108 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-108108
Is Your Infrastructure Affected by CVE-2026-108108?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.