CVE-2026-12220

HIGHPre-NVD 8.08.0—
EchelonGraph scoreMEDIUM confidence

Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2026-06-15. a secondary CVSS source baseline 8.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.0Exploit: Elevated riskExposed: 0

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

A vulnerability has been found in Yealink SIP-T46U 108.86.0.118. This affects the function mod_upgrade.SparePartsUpload of the file /api/upgrade/accupgradebychunk of the component Firmware Chunk Upload handler. Such manipulation of the argument uid leads to stack-based buffer overflow. The attack can only be initiated within the local network. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure and is working on a patch to fix it.

CVSS v3
8.0
EG Score
8.0(medium)
EG Risk
52(Track*)
EG Risk 52/100SSVC: 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
Severity80% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

June 15, 2026

Last Modified

July 24, 2026

References (5)

Vendor Advisories for CVE-2026-12220(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 75× 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 118 total refreshes for this CVE.

  1. 2026-07-27 14:13 UTCEPSS rescore
  2. 2026-07-27 08:47 UTCGHSA enrichment
  3. 2026-07-26 20:19 UTCEG score recompute
  4. 2026-07-26 20:19 UTCGHSA enrichment
  5. 2026-07-26 14:54 UTCEPSS rescore
  6. 2026-07-26 14:54 UTCEPSS rescore
  7. 2026-07-26 05:13 UTCEG score recompute
  8. 2026-07-26 05:13 UTCGHSA enrichment
  9. 2026-07-25 14:17 UTCEPSS rescore
  10. 2026-07-24 14:17 UTCEPSS rescore
  11. 2026-07-23 14:18 UTCEPSS rescore
  12. 2026-07-23 03:05 UTCEG score recompute
  13. 2026-07-22 14:08 UTCEPSS rescore
  14. 2026-07-21 15:24 UTCEPSS rescore
  15. 2026-07-20 17:08 UTCEPSS rescore
  16. 2026-07-19 14:30 UTCEPSS rescore
  17. 2026-07-19 02:28 UTCEPSS rescore
  18. 2026-07-18 10:04 UTCEPSS rescore
  19. 2026-07-16 23:01 UTCGHSA enrichment
  20. 2026-07-16 17:02 UTCEPSS rescore
  21. 2026-07-16 04:20 UTCGHSA enrichment
  22. 2026-07-15 16:57 UTCEPSS rescore
  23. 2026-07-15 15:51 UTCGHSA enrichment
  24. 2026-07-15 02:00 UTCEPSS rescore
  25. 2026-07-14 22:56 UTCGHSA enrichment
Show 75 more
  1. 2026-07-14 10:24 UTCGHSA enrichment
  2. 2026-07-13 22:30 UTCEPSS rescore
  3. 2026-07-13 20:58 UTCGHSA enrichment
  4. 2026-07-13 08:29 UTCGHSA enrichment
  5. 2026-07-13 06:12 UTCEPSS rescore
  6. 2026-07-12 15:59 UTCGHSA enrichment
  7. 2026-07-12 05:46 UTCEPSS rescore
  8. 2026-07-12 00:53 UTCGHSA enrichment
  9. 2026-07-11 12:24 UTCGHSA enrichment
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-10 23:55 UTCGHSA enrichment
  12. 2026-07-10 11:23 UTCGHSA enrichment
  13. 2026-07-09 21:19 UTCGHSA enrichment
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-09 03:28 UTCGHSA enrichment
  16. 2026-07-08 15:15 UTCEPSS rescore
  17. 2026-07-08 15:15 UTCEPSS rescore
  18. 2026-07-08 14:52 UTCGHSA enrichment
  19. 2026-07-08 01:38 UTCGHSA enrichment
  20. 2026-07-07 13:46 UTCEPSS rescore
  21. 2026-07-07 13:08 UTCGHSA enrichment
  22. 2026-07-07 00:30 UTCGHSA enrichment
  23. 2026-07-06 16:27 UTCEPSS rescore
  24. 2026-07-06 02:23 UTCEPSS rescore
  25. 2026-07-05 23:34 UTCGHSA enrichment
  26. 2026-07-05 11:06 UTCGHSA enrichment
  27. 2026-07-05 02:30 UTCEPSS rescore
  28. 2026-07-05 02:30 UTCEPSS rescore
  29. 2026-07-04 22:36 UTCGHSA enrichment
  30. 2026-07-04 10:08 UTCGHSA enrichment
  31. 2026-07-04 06:31 UTCEPSS rescore
  32. 2026-07-03 19:49 UTCGHSA enrichment
  33. 2026-07-03 07:21 UTCGHSA enrichment
  34. 2026-07-02 18:36 UTCGHSA enrichment
  35. 2026-07-02 06:07 UTCGHSA enrichment
  36. 2026-07-01 17:38 UTCGHSA enrichment
  37. 2026-07-01 15:06 UTCEPSS rescore
  38. 2026-07-01 15:06 UTCEPSS rescore
  39. 2026-07-01 05:02 UTCGHSA enrichment
  40. 2026-06-30 23:22 UTCEPSS rescore
  41. 2026-06-30 16:16 UTCGHSA enrichment
  42. 2026-06-30 03:44 UTCGHSA enrichment
  43. 2026-06-29 15:03 UTCGHSA enrichment
  44. 2026-06-29 14:06 UTCEPSS rescore
  45. 2026-06-29 02:35 UTCGHSA enrichment
  46. 2026-06-28 14:07 UTCEPSS rescore
  47. 2026-06-28 14:06 UTCGHSA enrichment
  48. 2026-06-28 04:56 UTCEPSS rescore
  49. 2026-06-28 04:56 UTCEPSS rescore
  50. 2026-06-28 01:38 UTCGHSA enrichment
  51. 2026-06-27 13:05 UTCGHSA enrichment
  52. 2026-06-27 07:35 UTCNVD updateCVSS v4 → 7.3
  53. 2026-06-27 06:04 UTCMITRE cvelistV5CVSS v4 → 8.6
  54. 2026-06-27 03:08 UTCEPSS rescore
  55. 2026-06-27 00:35 UTCGHSA enrichment
  56. 2026-06-26 11:59 UTCGHSA enrichment
  57. 2026-06-25 17:28 UTCGHSA enrichment
  58. 2026-06-25 13:49 UTCEPSS rescore
  59. 2026-06-25 04:59 UTCGHSA enrichment
  60. 2026-06-24 16:21 UTCGHSA enrichment
  61. 2026-06-24 14:05 UTCEPSS rescore
  62. 2026-06-24 03:53 UTCGHSA enrichment
  63. 2026-06-23 21:32 UTCEPSS rescore
  64. 2026-06-23 15:22 UTCGHSA enrichment
  65. 2026-06-23 02:47 UTCGHSA enrichment
  66. 2026-06-22 14:25 UTCEPSS rescore
  67. 2026-06-22 14:25 UTCEPSS rescore
  68. 2026-06-22 14:18 UTCGHSA enrichment
  69. 2026-06-22 01:43 UTCGHSA enrichment
  70. 2026-06-21 14:56 UTCEPSS rescore
  71. 2026-06-21 14:56 UTCEPSS rescore
  72. 2026-06-21 12:13 UTCGHSA enrichment
  73. 2026-06-21 01:59 UTCEPSS rescore
  74. 2026-06-21 01:59 UTCEPSS rescore
  75. 2026-06-20 23:38 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12220?
CVE-2026-12220 is a high vulnerability published on June 15, 2026. A vulnerability has been found in Yealink SIP-T46U 108.86.0.118. This affects the function mod_upgrade.SparePartsUpload of the file /api/upgrade/accupgradebychunk of the component Firmware Chunk Upload handler. Such manipulation of the argument uid leads to stack-based buffer overflow. The attack…
When was CVE-2026-12220 disclosed?
CVE-2026-12220 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12220 actively exploited?
CVE-2026-12220 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 70.3% of all scored CVEs.
What is the CVSS score of CVE-2026-12220?
CVE-2026-12220 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2026-12220?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12220, 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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