CVE-2026-11771

HIGHNVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-30. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

July 30, 2026

Last Modified

August 5, 2026

References (3)

Vendor Advisories for CVE-2026-11771(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuopenvpn (2.6.19-0ubuntu0.24.04.3) @ noble2026-08-20ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
openvpn—2.7.5-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
openvpn2.6.11-1 ... 2.6.9-1 (15 versions)2.6.14-0+deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
openvpn2.6.14-1, 2.6.14-1+deb13u1, 2.6.14-1+deb13u22.6.14-1+deb13u3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
openvpn2.6.14-1 ... 2.7.5-1~bpo13+1 (24 versions)2.7.5-1—

Weakness Classification(3)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 38× in last 7d / 129× 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 129 total refreshes for this CVE.

  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 20:55 UTCVendor advisory
  3. 2026-08-20 20:55 UTCGHSA enrichment
  4. 2026-08-20 08:12 UTCVendor advisory
  5. 2026-08-20 08:12 UTCGHSA enrichment
  6. 2026-08-19 19:29 UTCEG score recompute
  7. 2026-08-19 19:29 UTCVendor advisory
  8. 2026-08-19 19:29 UTCGHSA enrichment
  9. 2026-08-19 17:03 UTCEPSS rescore
  10. 2026-08-19 04:38 UTCVendor advisory
  11. 2026-08-19 04:38 UTCGHSA enrichment
  12. 2026-08-18 15:56 UTCEG score recompute
  13. 2026-08-18 15:55 UTCGHSA enrichment
  14. 2026-08-18 13:48 UTCEPSS rescore
  15. 2026-08-18 01:01 UTCEG score recompute
  16. 2026-08-18 01:01 UTCVendor advisory
  17. 2026-08-18 01:01 UTCGHSA enrichment
  18. 2026-08-17 11:34 UTCVendor advisory
  19. 2026-08-17 11:34 UTCGHSA enrichment
  20. 2026-08-16 22:52 UTCEG score recompute
  21. 2026-08-16 22:52 UTCVendor advisory
  22. 2026-08-16 22:52 UTCGHSA enrichment
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-16 10:09 UTCEG score recompute
  25. 2026-08-16 10:09 UTCVendor advisory
Show 75 more
  1. 2026-08-16 10:09 UTCGHSA enrichment
  2. 2026-08-16 02:14 UTCEPSS rescore
  3. 2026-08-15 21:27 UTCVendor advisory
  4. 2026-08-15 21:27 UTCGHSA enrichment
  5. 2026-08-15 08:44 UTCEG score recompute
  6. 2026-08-15 08:44 UTCVendor advisory
  7. 2026-08-15 08:44 UTCGHSA enrichment
  8. 2026-08-15 01:30 UTCEPSS rescore
  9. 2026-08-14 20:01 UTCVendor advisory
  10. 2026-08-14 20:01 UTCGHSA enrichment
  11. 2026-08-14 07:19 UTCEG score recompute
  12. 2026-08-14 07:19 UTCVendor advisory
  13. 2026-08-14 07:19 UTCGHSA enrichment
  14. 2026-08-13 22:00 UTCEPSS rescore
  15. 2026-08-13 18:36 UTCVendor advisory
  16. 2026-08-13 18:36 UTCGHSA enrichment
  17. 2026-08-13 05:54 UTCVendor advisory
  18. 2026-08-13 05:54 UTCGHSA enrichment
  19. 2026-08-12 17:11 UTCEG score recompute
  20. 2026-08-12 17:11 UTCVendor advisory
  21. 2026-08-12 17:11 UTCGHSA enrichment
  22. 2026-08-12 13:50 UTCEPSS rescore
  23. 2026-08-12 04:29 UTCVendor advisory
  24. 2026-08-12 04:29 UTCGHSA enrichment
  25. 2026-08-11 15:40 UTCEG score recompute
  26. 2026-08-11 15:40 UTCVendor advisory
  27. 2026-08-11 15:40 UTCGHSA enrichment
  28. 2026-08-11 13:42 UTCEPSS rescore
  29. 2026-08-11 02:57 UTCEG score recompute
  30. 2026-08-11 02:57 UTCVendor advisory
  31. 2026-08-11 02:57 UTCGHSA enrichment
  32. 2026-08-10 23:59 UTCEPSS rescore
  33. 2026-08-10 14:15 UTCVendor advisory
  34. 2026-08-10 14:15 UTCGHSA enrichment
  35. 2026-08-10 01:32 UTCEG score recompute
  36. 2026-08-10 01:32 UTCVendor advisory
  37. 2026-08-10 01:32 UTCGHSA enrichment
  38. 2026-08-09 13:46 UTCEPSS rescore
  39. 2026-08-09 12:50 UTCVendor advisory
  40. 2026-08-09 12:50 UTCGHSA enrichment
  41. 2026-08-09 00:07 UTCEG score recompute
  42. 2026-08-09 00:07 UTCVendor advisory
  43. 2026-08-09 00:07 UTCGHSA enrichment
  44. 2026-08-08 16:37 UTCEPSS rescore
  45. 2026-08-08 11:24 UTCVendor advisory
  46. 2026-08-08 11:24 UTCGHSA enrichment
  47. 2026-08-07 22:42 UTCEG score recompute
  48. 2026-08-07 22:42 UTCVendor advisory
  49. 2026-08-07 22:42 UTCGHSA enrichment
  50. 2026-08-07 09:59 UTCVendor advisory
  51. 2026-08-07 09:59 UTCGHSA enrichment
  52. 2026-08-06 21:16 UTCEG score recompute
  53. 2026-08-06 21:16 UTCVendor advisory
  54. 2026-08-06 21:16 UTCGHSA enrichment
  55. 2026-08-06 13:46 UTCEPSS rescore
  56. 2026-08-06 08:34 UTCEG score recompute
  57. 2026-08-06 08:34 UTCVendor advisory
  58. 2026-08-06 08:34 UTCGHSA enrichment
  59. 2026-08-05 19:51 UTCEG score recompute▲ 0.50
  60. 2026-08-05 19:51 UTCVendor advisory
  61. 2026-08-05 19:51 UTCGHSA enrichment
  62. 2026-08-05 19:51 UTCNVD updateCVSS v3 → 7.5
  63. 2026-08-05 19:17 UTCEPSS rescore
  64. 2026-08-05 15:25 UTCVendor advisory
  65. 2026-08-05 15:25 UTCGHSA enrichment
  66. 2026-08-05 02:42 UTCEG score recompute
  67. 2026-08-05 02:42 UTCVendor advisory
  68. 2026-08-05 02:42 UTCGHSA enrichment
  69. 2026-08-04 15:09 UTCEPSS rescore
  70. 2026-08-04 14:00 UTCEG score recompute
  71. 2026-08-04 14:00 UTCGHSA enrichment
  72. 2026-08-04 10:38 UTCEPSS rescore
  73. 2026-08-04 01:18 UTCVendor advisory
  74. 2026-08-04 01:18 UTCGHSA enrichment
  75. 2026-08-03 12:35 UTCEG score recompute

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-11771?
CVE-2026-11771 is a high vulnerability published on July 30, 2026. OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server
When was CVE-2026-11771 disclosed?
CVE-2026-11771 was first published in the National Vulnerability Database on July 30, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11771 actively exploited?
CVE-2026-11771 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 69.2% of all scored CVEs.
What is the CVSS score of CVE-2026-11771?
CVE-2026-11771 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-11771?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11771, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-11771

Explore →

Is Your Infrastructure Affected by CVE-2026-11771?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs