CVE-2026-0516

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-05. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100CISA 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
Severity65% × 45%
Exploitation0% × 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
0.3%
EPSS %ILE
25th
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 5, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 5, 2026
No fix on record yet.
generic

Security Advisory

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0009

Vendor Advisories for CVE-2026-0516(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 13× in last 7d / 64× 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 158 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-0516?
CVE-2026-0516 is a medium vulnerability published on August 5, 2026. A improper neutralization of HTTP Headers for Scripting Syntax vulnerability in SonicOS could allow a remote attacker to manipulate the Host header and redirect firewall management users to arbitrary web domains.
When was CVE-2026-0516 disclosed?
CVE-2026-0516 was first published on August 5, 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-2026-0516 actively exploited?
CVE-2026-0516 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-0516?
CVE-2026-0516 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-0516?
No fix for CVE-2026-0516 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-2026-0516 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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