CVE-2015-2929

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.2%, top 36% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

The Hidden Service (HS) client implementation in Tor before 0.2.4.27, 0.2.5.x before 0.2.5.12, and 0.2.6.x before 0.2.6.7 allows remote servers to cause a denial of service (assertion failure and application exit) via a malformed HS descriptor.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
65%
KEV
Not listed

Published

January 24, 2020

Last Modified

November 21, 2024

References (4)

Affected Packages

(6 across 6 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
tor—0.2.5.12-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
tor—0.2.5.12-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
tor—0.2.5.12-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
tor—0.2.5.12-1—
Debian:6.0(1)
PackageVulnerable rangeFixed inDependents
tor0.2.1.29-1 ... 0.2.4.9-alpha-1 (106 versions)0.2.4.27-1~deb6u1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
tor0.2.3.25-1 ... 0.2.4.9-alpha-1 (32 versions)0.2.4.27-1—

Data Freshness Timeline

(refreshed 7× in last 7d / 24× 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 111 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2015-2929?
CVE-2015-2929 is a high vulnerability published on January 24, 2020. The Hidden Service (HS) client implementation in Tor before 0.2.4.27, 0.2.5.x before 0.2.5.12, and 0.2.6.x before 0.2.6.7 allows remote servers to cause a denial of service (assertion failure and application exit) via a malformed HS descriptor.
When was CVE-2015-2929 disclosed?
CVE-2015-2929 was first published in the National Vulnerability Database on January 24, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-2929 actively exploited?
CVE-2015-2929 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 35.3% of all scored CVEs.
What is the CVSS score of CVE-2015-2929?
CVE-2015-2929 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2015-2929?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-2929, 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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