CVE-2026-11771

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM 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(medium)
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 (2.7.0-1ubuntu1.2) @ resolute2026-09-19ubuntu

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 31× in last 7d / 131× 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 257 total refreshes for this CVE.

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

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 68.7% 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

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