CVE-2017-13099

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 25%CVSS: 5.9Exploit: Metasploit · epss top5pct · public exploitExposed services: Not assessed

A fix is available — apply it.

wolfSSL prior to version 3.12.2 provides a weak Bleichenbacher oracle when any TLS cipher suite using RSA key exchange is negotiated. An attacker can recover the private key from a vulnerable wolfSSL application. This vulnerability is referred to as "ROBOT."

CVSS v3
5.9
EG Score
5.9MEDIUMmedium confidence
EG Risk
57
EG Risk 57/100CISA 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
Severity59% × 45%
Exploitation65% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
25%
EPSS %ILE
97th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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

December 13, 2017

Last Modified

June 17, 2026

References (12)

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
wolfssl—
  • every version up to 3.13.0+dfsg-1: fixed in 3.13.0+dfsg-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wolfssl—
  • every version up to 3.13.0+dfsg-1: fixed in 3.13.0+dfsg-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wolfssl—
  • every version up to 3.13.0+dfsg-1: fixed in 3.13.0+dfsg-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 20× 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 138 total refreshes for this CVE.

  1. 2026-10-09 20:02 UTCEPSS rescore
  2. 2026-10-08 16:35 UTCEPSS rescore
  3. 2026-10-07 23:41 UTCEPSS rescore
  4. 2026-10-07 20:24 UTCOSV refresh
  5. 2026-10-06 15:11 UTCEPSS rescore
  6. 2026-10-03 14:21 UTCEPSS rescore
  7. 2026-09-30 14:58 UTCEPSS rescore
  8. 2026-09-30 09:25 UTCEG score recompute▼ 1.60
  9. 2026-09-27 13:40 UTCEPSS rescore
  10. 2026-09-26 15:53 UTCEPSS rescore
  11. 2026-09-24 13:59 UTCEPSS rescore
  12. 2026-09-19 15:36 UTCEPSS rescore
  13. 2026-09-18 19:22 UTCEPSS rescore
  14. 2026-09-18 02:36 UTCOSV refresh
  15. 2026-09-17 19:22 UTCEPSS rescore
  16. 2026-09-15 03:05 UTCEPSS rescore
  17. 2026-09-13 16:42 UTCEPSS rescore
  18. 2026-09-12 14:55 UTCEPSS rescore
  19. 2026-09-11 09:31 UTCEPSS rescore
  20. 2026-09-10 09:26 UTCEPSS rescore
  21. 2026-09-07 15:56 UTCEPSS rescore
  22. 2026-09-04 13:56 UTCEPSS rescore
  23. 2026-09-04 05:01 UTCEPSS rescore
  24. 2026-09-02 14:07 UTCEPSS rescore
  25. 2026-09-01 13:48 UTCEPSS rescore
Show 75 more
  1. 2026-09-01 03:31 UTCEPSS rescore
  2. 2026-08-30 19:13 UTCEPSS rescore
  3. 2026-08-30 03:18 UTCOSV refresh
  4. 2026-08-28 21:36 UTCEPSS rescore
  5. 2026-08-27 14:20 UTCEPSS rescore
  6. 2026-08-26 14:41 UTCEPSS rescore
  7. 2026-08-25 13:44 UTCEPSS rescore
  8. 2026-08-24 14:10 UTCEPSS rescore
  9. 2026-08-21 23:44 UTCEPSS rescore
  10. 2026-08-20 22:50 UTCEPSS rescore
  11. 2026-08-19 16:59 UTCEPSS rescore
  12. 2026-08-18 13:43 UTCEPSS rescore
  13. 2026-08-16 14:51 UTCEPSS rescore
  14. 2026-08-16 02:10 UTCEPSS rescore
  15. 2026-08-15 01:26 UTCEPSS rescore
  16. 2026-08-13 21:56 UTCEPSS rescore
  17. 2026-08-13 15:21 UTCOSV refresh
  18. 2026-08-08 16:32 UTCEPSS rescore
  19. 2026-08-07 16:22 UTCEPSS rescore
  20. 2026-08-06 13:42 UTCEPSS rescore
  21. 2026-08-05 19:12 UTCEPSS rescore
  22. 2026-08-04 15:05 UTCEPSS rescore
  23. 2026-08-03 10:30 UTCEPSS rescore
  24. 2026-08-02 02:23 UTCEPSS rescore
  25. 2026-08-01 04:11 UTCEPSS rescore
  26. 2026-07-30 16:24 UTCEPSS rescore
  27. 2026-07-30 01:26 UTCEPSS rescore
  28. 2026-07-28 21:21 UTCOSV refresh
  29. 2026-07-28 15:32 UTCEPSS rescore
  30. 2026-07-26 14:51 UTCEPSS rescore
  31. 2026-07-25 14:13 UTCEPSS rescore
  32. 2026-07-23 14:15 UTCEPSS rescore
  33. 2026-07-23 01:26 UTCEG score recompute
  34. 2026-07-22 22:05 UTCEG score recompute▲ 1.60
  35. 2026-07-22 14:04 UTCEPSS rescore
  36. 2026-07-21 15:21 UTCEPSS rescore
  37. 2026-07-21 15:21 UTCEPSS rescore
  38. 2026-07-20 17:04 UTCEPSS rescore
  39. 2026-07-20 17:04 UTCEPSS rescore
  40. 2026-07-19 02:26 UTCEPSS rescore
  41. 2026-07-19 02:26 UTCEPSS rescore
  42. 2026-07-18 10:00 UTCEPSS rescore
  43. 2026-07-16 16:59 UTCEPSS rescore
  44. 2026-07-16 16:59 UTCEPSS rescore
  45. 2026-07-15 16:54 UTCEPSS rescore
  46. 2026-07-15 16:54 UTCEPSS rescore
  47. 2026-07-15 01:56 UTCEPSS rescore
  48. 2026-07-13 22:26 UTCEPSS rescore
  49. 2026-07-12 05:43 UTCEPSS rescore
  50. 2026-07-11 13:52 UTCOSV refresh
  51. 2026-07-11 08:24 UTCEPSS rescore
  52. 2026-07-09 19:06 UTCEPSS rescore
  53. 2026-07-08 15:10 UTCEPSS rescore
  54. 2026-07-06 02:20 UTCEPSS rescore
  55. 2026-07-05 02:27 UTCEPSS rescore
  56. 2026-07-04 06:28 UTCEPSS rescore
  57. 2026-07-01 15:02 UTCEPSS rescore
  58. 2026-07-01 15:02 UTCEPSS rescore
  59. 2026-06-29 14:03 UTCEPSS rescore
  60. 2026-06-28 14:04 UTCEPSS rescore
  61. 2026-06-28 04:53 UTCEPSS rescore
  62. 2026-06-27 03:05 UTCEPSS rescore
  63. 2026-06-25 13:47 UTCEPSS rescore
  64. 2026-06-25 13:47 UTCEPSS rescore
  65. 2026-06-24 14:02 UTCEPSS rescore
  66. 2026-06-23 21:30 UTCEPSS rescore
  67. 2026-06-22 20:35 UTCOSV refresh
  68. 2026-06-22 14:23 UTCEPSS rescore
  69. 2026-06-22 14:23 UTCEPSS rescore
  70. 2026-06-21 14:54 UTCEPSS rescore
  71. 2026-06-21 14:54 UTCEPSS rescore
  72. 2026-06-21 01:57 UTCEPSS rescore
  73. 2026-06-21 01:57 UTCEPSS rescore
  74. 2026-06-18 17:50 UTCEPSS rescore
  75. 2026-06-17 17:50 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Metasploit module). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitauxiliary/scanner/ssl/bleichenbacher_oracle✓ verified
    First seen Jun 17, 2009

    Scanner for Bleichenbacher Oracle in RSA PKCS #1 v1.5

    Open source ↗

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2017-13099?
CVE-2017-13099 is a medium vulnerability published on December 13, 2017. wolfSSL prior to version 3.12.2 provides a weak Bleichenbacher oracle when any TLS cipher suite using RSA key exchange is negotiated. An attacker can recover the private key from a vulnerable wolfSSL application. This vulnerability is referred to as "ROBOT."
When was CVE-2017-13099 disclosed?
CVE-2017-13099 was first published on December 13, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-13099 actively exploited?
CVE-2017-13099 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 25% probability of exploitation in the next 30 days (97th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2017-13099?
CVE-2017-13099 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2017-13099?
A fix for CVE-2017-13099 is available: update to the fixed version the vendor names in its advisory.

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