CVE-2026-57977

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-03. the CNA's CVSS baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.1Exploit: None knownExposed: 0

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

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

July 3, 2026

Last Modified

September 9, 2026

Advisory Details (1)

Auto-updated Jul 7, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57977

Vendor Advisories for CVE-2026-57977(2)

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 18× in last 7d / 127× 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 335 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-57977?
CVE-2026-57977 is a high vulnerability published on July 3, 2026. Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
When was CVE-2026-57977 disclosed?
CVE-2026-57977 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57977 actively exploited?
CVE-2026-57977 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 54.3% of all scored CVEs.
What is the CVSS score of CVE-2026-57977?
CVE-2026-57977 has a CVSS v4.0 base score of 7.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-57977?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57977, 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.

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