CVE-2026-21550

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-03. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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

In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA 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 computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; 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
0.7%
EPSS %ILE
51st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; 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 (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

August 3, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 3, 2026
No patch confirmed yet.
generic
https://www.unisoc.com/en/support/product-security-bulletin/2084109408382668801

Vendor Advisories for CVE-2026-21550(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 / 87× 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 211 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-21550?
CVE-2026-21550 is a high vulnerability published on August 3, 2026. In modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed
When was CVE-2026-21550 disclosed?
CVE-2026-21550 was first published on August 3, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21550 actively exploited?
CVE-2026-21550 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-21550?
CVE-2026-21550 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-21550?
No fix for CVE-2026-21550 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-2026-21550 are linked in the Vendor Advisories panel on this page.

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