CVE-2015-1789

HIGHNVD 7.58.7▲
EchelonGraph scoreHIGH confidence

Score elevated to 8.7 because EPSS predicts 74% probability of exploitation within the next 30 days (top 0.6% of all CVEs). NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Elevated
8.7EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 74%
CISA-KEV: Not listedEPSS PROB: 74%CVSS: 7.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack against a server that supports client authentication with a custom verification callback.

CVSS v3
7.5
EG Score
8.7(high)
EG Risk
73(Track)
EG Risk 73/100SSVC: 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
Severity87% × 45%
Exploitation74% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
74%
EPSS %ILE
99%
KEV
Not listed

Published

June 12, 2015

Last Modified

May 6, 2026

References (110)

Vendor Advisories for CVE-2015-1789(1)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibssl1.0.0 (1.0.1f-1ubuntu11.4) @ vivid2026-05-23ubuntu
redhatopenssl-0:0.9.8e-36.el5_112015-06-30redhat
redhatopenssl-1:1.0.1e-42.ael7b_1.82015-06-15redhat

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

(7 across 7 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
openssl—1.0.2b-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
openssl—1.0.2b-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
openssl—1.0.2b-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
openssl—1.0.2b-1—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
openssl0.9.8o-4 ... 0.9.8o-4squeeze9 (20 versions)0.9.8o-4squeeze21—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
openssl1.0.1e-2 ... 1.0.1e-2+deb7u9 (17 versions)1.0.1e-2+deb7u17—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
openssl1.0.1k-3, 1.0.1k-3+alpha1.0.1k-3+deb8u1—

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 2× in last 7d / 11× 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 102 total refreshes for this CVE.

  1. 2026-09-19 10:36 UTCOSV refresh
  2. 2026-09-18 19:22 UTCEPSS rescore
  3. 2026-09-17 19:21 UTCEPSS rescore
  4. 2026-09-15 03:05 UTCEPSS rescore
  5. 2026-09-12 14:55 UTCEPSS rescore
  6. 2026-09-10 09:26 UTCEPSS rescore
  7. 2026-09-06 13:42 UTCEPSS rescore
  8. 2026-09-05 15:23 UTCEPSS rescore
  9. 2026-09-04 13:55 UTCEPSS rescore
  10. 2026-08-31 14:04 UTCOSV refresh
  11. 2026-08-30 19:12 UTCEPSS rescore
  12. 2026-08-26 14:41 UTCEPSS rescore
  13. 2026-08-21 23:44 UTCEPSS rescore
  14. 2026-08-20 22:50 UTCEPSS rescore
  15. 2026-08-19 16:59 UTCEPSS rescore
  16. 2026-08-18 13:43 UTCEPSS rescore
  17. 2026-08-16 14:51 UTCEPSS rescore
  18. 2026-08-16 02:09 UTCEPSS rescore
  19. 2026-08-15 01:25 UTCEPSS rescore
  20. 2026-08-14 19:24 UTCOSV refresh
  21. 2026-08-12 13:46 UTCEPSS rescore
  22. 2026-08-09 13:42 UTCEPSS rescore
  23. 2026-08-08 16:31 UTCEPSS rescore
  24. 2026-08-07 16:22 UTCEPSS rescore
  25. 2026-08-05 19:12 UTCEPSS rescore
Show 75 more
  1. 2026-08-04 15:04 UTCEPSS rescore
  2. 2026-07-30 16:23 UTCEPSS rescore
  3. 2026-07-30 07:54 UTCOSV refresh
  4. 2026-07-28 15:31 UTCEPSS rescore
  5. 2026-07-26 14:50 UTCEPSS rescore
  6. 2026-07-24 14:13 UTCEPSS rescore
  7. 2026-07-23 01:16 UTCEG score recompute
  8. 2026-07-23 00:19 UTCEG score recompute▲ 1.20
  9. 2026-07-22 21:57 UTCEG score recompute
  10. 2026-07-22 14:04 UTCEPSS rescore
  11. 2026-07-21 15:21 UTCEPSS rescore
  12. 2026-07-21 15:21 UTCEPSS rescore
  13. 2026-07-20 17:03 UTCEPSS rescore
  14. 2026-07-15 16:54 UTCEPSS rescore
  15. 2026-07-15 16:54 UTCEPSS rescore
  16. 2026-07-12 17:07 UTCOSV refresh
  17. 2026-07-11 08:23 UTCEPSS rescore
  18. 2026-07-09 19:05 UTCEPSS rescore
  19. 2026-07-08 15:10 UTCEPSS rescore
  20. 2026-07-04 06:27 UTCEPSS rescore
  21. 2026-07-01 15:02 UTCEPSS rescore
  22. 2026-07-01 15:02 UTCEPSS rescore
  23. 2026-06-30 23:19 UTCEPSS rescore
  24. 2026-06-30 23:19 UTCEPSS rescore
  25. 2026-06-29 14:03 UTCEPSS rescore
  26. 2026-06-28 14:03 UTCEPSS rescore
  27. 2026-06-28 04:53 UTCEPSS rescore
  28. 2026-06-25 13:47 UTCEPSS rescore
  29. 2026-06-25 13:47 UTCEPSS rescore
  30. 2026-06-24 14:02 UTCEPSS rescore
  31. 2026-06-24 14:02 UTCEPSS rescore
  32. 2026-06-23 23:29 UTCOSV refresh
  33. 2026-06-23 21:30 UTCEPSS rescore
  34. 2026-06-17 17:49 UTCEPSS rescore
  35. 2026-06-15 17:45 UTCEPSS rescore
  36. 2026-06-14 23:14 UTCEPSS rescore
  37. 2026-06-13 22:57 UTCEPSS rescore
  38. 2026-06-12 23:09 UTCEPSS rescore
  39. 2026-06-11 13:57 UTCEPSS rescore
  40. 2026-06-10 22:15 UTCEPSS rescore
  41. 2026-06-08 14:14 UTCEPSS rescore
  42. 2026-06-07 15:22 UTCEPSS rescore
  43. 2026-06-07 06:25 UTCOSV refresh
  44. 2026-06-05 22:44 UTCEPSS rescore
  45. 2026-06-05 06:08 UTCEPSS rescore
  46. 2026-06-05 06:08 UTCEPSS rescore
  47. 2026-06-04 13:10 UTCEPSS rescore
  48. 2026-06-04 13:09 UTCEPSS rescore
  49. 2026-06-02 20:10 UTCEPSS rescore
  50. 2026-06-02 20:10 UTCEPSS rescore
  51. 2026-06-01 13:49 UTCEPSS rescore
  52. 2026-06-01 13:49 UTCEPSS rescore
  53. 2026-05-31 22:28 UTCEPSS rescore
  54. 2026-05-31 22:28 UTCEPSS rescore
  55. 2026-05-31 22:28 UTCEPSS rescore
  56. 2026-05-31 00:14 UTCEPSS rescore
  57. 2026-05-29 13:41 UTCEPSS rescore
  58. 2026-05-28 13:42 UTCEPSS rescore
  59. 2026-05-28 13:42 UTCEPSS rescore
  60. 2026-05-27 13:38 UTCEPSS rescore
  61. 2026-05-27 13:38 UTCEPSS rescore
  62. 2026-05-26 13:41 UTCEPSS rescore
  63. 2026-05-26 13:41 UTCEPSS rescore
  64. 2026-05-26 07:16 UTCEPSS rescore
  65. 2026-05-26 07:16 UTCEPSS rescore
  66. 2026-05-24 16:43 UTCEPSS rescore
  67. 2026-05-23 01:06 UTCEG score recompute
  68. 2026-05-23 01:06 UTCVendor advisory
  69. 2026-05-23 01:06 UTCGHSA enrichment
  70. 2026-05-21 22:40 UTCEPSS rescore
  71. 2026-05-20 22:37 UTCEPSS rescore
  72. 2026-05-20 22:37 UTCEPSS rescore
  73. 2026-05-20 11:21 UTCEPSS rescore
  74. 2026-05-20 11:21 UTCEPSS rescore
  75. 2026-05-20 11:21 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2015-1789?
CVE-2015-1789 is a high vulnerability published on June 12, 2015. The X509cmptime function in crypto/x509/x509vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1TIME data, as demonstrated…
When was CVE-2015-1789 disclosed?
CVE-2015-1789 was first published in the National Vulnerability Database on June 12, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-1789 actively exploited?
CVE-2015-1789 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74% probability of exploitation in the next 30 days, which ranks it in the top 0.5% of all scored CVEs.
What is the CVSS score of CVE-2015-1789?
CVE-2015-1789 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.7.
How do I remediate CVE-2015-1789?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-1789, 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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