CVE-2026-7273

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-16. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
23.4%
KEV
Not listed

Published

June 16, 2026

Last Modified

June 18, 2026

Advisory Details (1)

Auto-updated Jun 16, 2026
No patch confirmed yet.
generic

Zyxel security advisory for stack-based buffer overflow vulnerability in GS1900 series switches | Zyxel Networks

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-stack-based-buffer-overflow-vulnerability-in-gs1900-series-switches-06-16-2026

Vendor Advisories for CVE-2026-7273(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 36× in last 7d / 114× 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 114 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-7273?
CVE-2026-7273 is a high vulnerability published on June 16, 2026. A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.
When was CVE-2026-7273 disclosed?
CVE-2026-7273 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7273 actively exploited?
CVE-2026-7273 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 23.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-7273?
CVE-2026-7273 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-7273?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7273, 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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