CVE-2026-61876

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-12. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: Elevated riskExposed: 0

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

LuCI versions fail to properly encode DHCPv6 lease hostnames before rendering in status tables, allowing adjacent network attackers to inject HTML markup. Attackers can send a DHCPv6 Client FQDN containing script tags that execute in the administrator's browser when viewing DHCP lease pages.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
67%
KEV
Not listed

Published

July 12, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Jul 12, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

LuCI DHCPv6 Lease Hostname Stored Cross-Site Scripting | Advisories | VulnCheck

https://www.vulncheck.com/advisories/luci-dhcpv6-lease-hostname-stored-cross-site-scripting
github Patch Available🟡 PoC Available

luci-mod-network: luci-mod-status: DHCPv6 lease hostname stored XSS in LuCI status tables · Advisory · openwrt/luci · GitHub

https://github.com/openwrt/luci/security/advisories/GHSA-686p-p8p9-x6fh

Vendor Advisories for CVE-2026-61876(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 19× in last 7d / 107× 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.

Showing the most recent 100 of 162 total refreshes for this CVE.

  1. 2026-08-30 05:45 UTCEG score recompute
  2. 2026-08-30 05:45 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-28 02:44 UTCEG score recompute
  6. 2026-08-28 02:44 UTCGHSA enrichment
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-27 14:16 UTCGHSA enrichment
  9. 2026-08-27 00:21 UTCEG score recompute
  10. 2026-08-27 00:21 UTCGHSA enrichment
  11. 2026-08-26 14:46 UTCEPSS rescore
  12. 2026-08-26 02:41 UTCEG score recompute
  13. 2026-08-26 02:41 UTCGHSA enrichment
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-25 09:40 UTCGHSA enrichment
  16. 2026-08-24 20:07 UTCEG score recompute
  17. 2026-08-24 20:07 UTCGHSA enrichment
  18. 2026-08-24 06:51 UTCGHSA enrichment
  19. 2026-08-23 18:23 UTCGHSA enrichment
  20. 2026-08-23 05:55 UTCEG score recompute
  21. 2026-08-23 05:55 UTCGHSA enrichment
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-22 17:25 UTCGHSA enrichment
  24. 2026-08-22 04:41 UTCEG score recompute
  25. 2026-08-22 04:41 UTCGHSA enrichment
Show 75 more
  1. 2026-08-21 23:49 UTCEPSS rescore
  2. 2026-08-21 15:46 UTCGHSA enrichment
  3. 2026-08-21 03:14 UTCEG score recompute
  4. 2026-08-21 03:14 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 14:44 UTCGHSA enrichment
  7. 2026-08-20 01:25 UTCEG score recompute
  8. 2026-08-20 01:25 UTCGHSA enrichment
  9. 2026-08-19 17:04 UTCEPSS rescore
  10. 2026-08-19 12:17 UTCGHSA enrichment
  11. 2026-08-18 23:01 UTCEG score recompute
  12. 2026-08-18 23:01 UTCGHSA enrichment
  13. 2026-08-18 13:48 UTCEPSS rescore
  14. 2026-08-18 10:34 UTCGHSA enrichment
  15. 2026-08-17 22:03 UTCEG score recompute
  16. 2026-08-17 22:03 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 09:33 UTCGHSA enrichment
  19. 2026-08-16 21:06 UTCEG score recompute
  20. 2026-08-16 21:06 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 08:38 UTCEG score recompute
  23. 2026-08-16 08:38 UTCGHSA enrichment
  24. 2026-08-15 20:10 UTCGHSA enrichment
  25. 2026-08-15 07:41 UTCEG score recompute
  26. 2026-08-15 07:41 UTCGHSA enrichment
  27. 2026-08-15 01:30 UTCEPSS rescore
  28. 2026-08-14 18:57 UTCGHSA enrichment
  29. 2026-08-14 06:26 UTCEG score recompute
  30. 2026-08-14 06:26 UTCGHSA enrichment
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-13 17:58 UTCGHSA enrichment
  33. 2026-08-13 05:06 UTCGHSA enrichment
  34. 2026-08-12 16:37 UTCEG score recompute
  35. 2026-08-12 16:37 UTCGHSA enrichment
  36. 2026-08-12 13:51 UTCEPSS rescore
  37. 2026-08-12 04:05 UTCEG score recompute
  38. 2026-08-12 04:05 UTCGHSA enrichment
  39. 2026-08-11 15:37 UTCEG score recompute
  40. 2026-08-11 15:37 UTCGHSA enrichment
  41. 2026-08-11 03:07 UTCEG score recompute
  42. 2026-08-11 03:07 UTCGHSA enrichment
  43. 2026-08-11 00:00 UTCEPSS rescore
  44. 2026-08-10 14:40 UTCGHSA enrichment
  45. 2026-08-10 02:12 UTCEG score recompute
  46. 2026-08-10 02:12 UTCGHSA enrichment
  47. 2026-08-09 13:47 UTCEPSS rescore
  48. 2026-08-09 13:44 UTCGHSA enrichment
  49. 2026-08-09 01:17 UTCEG score recompute
  50. 2026-08-09 01:17 UTCGHSA enrichment
  51. 2026-08-08 16:37 UTCEPSS rescore
  52. 2026-08-08 12:49 UTCGHSA enrichment
  53. 2026-08-08 00:21 UTCEG score recompute
  54. 2026-08-08 00:21 UTCGHSA enrichment
  55. 2026-08-07 11:53 UTCGHSA enrichment
  56. 2026-08-06 23:25 UTCEG score recompute
  57. 2026-08-06 23:25 UTCGHSA enrichment
  58. 2026-08-06 13:47 UTCEPSS rescore
  59. 2026-08-06 10:58 UTCGHSA enrichment
  60. 2026-08-05 22:29 UTCEG score recompute
  61. 2026-08-05 22:29 UTCGHSA enrichment
  62. 2026-08-05 19:17 UTCEPSS rescore
  63. 2026-08-05 19:17 UTCEPSS rescore
  64. 2026-08-05 10:01 UTCGHSA enrichment
  65. 2026-08-04 21:21 UTCEG score recompute
  66. 2026-08-04 21:21 UTCGHSA enrichment
  67. 2026-08-04 15:10 UTCEPSS rescore
  68. 2026-08-04 10:39 UTCEPSS rescore
  69. 2026-08-04 08:35 UTCGHSA enrichment
  70. 2026-08-03 20:07 UTCEG score recompute
  71. 2026-08-03 20:07 UTCGHSA enrichment
  72. 2026-08-03 10:36 UTCEPSS rescore
  73. 2026-08-03 07:37 UTCGHSA enrichment
  74. 2026-08-02 19:07 UTCGHSA enrichment
  75. 2026-08-02 06:39 UTCEG score recompute

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-52637
    First seen Aug 11, 2026

    LuCI DHCPv6 - Lease Hostname Stored Cross-Site Scripting

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-61876?
CVE-2026-61876 is a high vulnerability published on July 12, 2026. LuCI versions fail to properly encode DHCPv6 lease hostnames before rendering in status tables, allowing adjacent network attackers to inject HTML markup. Attackers can send a DHCPv6 Client FQDN containing script tags that execute in the administrator's browser when viewing DHCP lease pages.
When was CVE-2026-61876 disclosed?
CVE-2026-61876 was first published in the National Vulnerability Database on July 12, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61876 actively exploited?
CVE-2026-61876 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 32.6% of all scored CVEs.
What is the CVSS score of CVE-2026-61876?
CVE-2026-61876 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-61876?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61876, 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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