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: 0.7%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100CISA 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
Severity75% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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

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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntuopenvpn (2.5.11-0ubuntu0.22.04.4) @ jammy2026-10-04ubuntu

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 rangeFix by version rangeDependents
openvpn—
  • 2.1.0 up to 2.7.5-r0: fixed in 2.7.5-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openvpn2.6.11-1 ... 2.6.9-1 (15 versions)
  • every version up to 2.6.14-0+deb12u2: fixed in 2.6.14-0+deb12u2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openvpn2.6.14-1, 2.6.14-1+deb13u1, 2.6.14-1+deb13u2
  • every version up to 2.6.14-1+deb13u3: fixed in 2.6.14-1+deb13u3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openvpn2.6.14-1 ... 2.7.5-1~bpo13+1 (24 versions)
  • every version up to 2.7.5-1: fixed in 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 22× in last 7d / 113× 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 307 total refreshes for this CVE.

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

Related CVEs(same product + 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 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 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-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?
A fix for CVE-2026-11771 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-11771 are linked in the Vendor Advisories panel on this page.

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