CVE-2016-4407

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2022-05-17. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.5Exploit: NoneExposed: 0

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

The DSA algorithm implementation in SAP SAPCRYPTOLIB 5.555.38 does not properly check signatures, which allows remote authenticated users to impersonate arbitrary users via unspecified vectors, aka SAP Security Note 2223008.

CVSS v3
6.5
EG Score
6.5(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
Severity65% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
57.7%
KEV
Not listed

Published

October 13, 2016

Last Modified

May 6, 2026

References (6)

Data Freshness Timeline

(refreshed 12× in last 7d / 41× 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 101 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2016-4407?
CVE-2016-4407 is a medium vulnerability published on October 13, 2016. The DSA algorithm implementation in SAP SAPCRYPTOLIB 5.555.38 does not properly check signatures, which allows remote authenticated users to impersonate arbitrary users via unspecified vectors, aka SAP Security Note 2223008.
When was CVE-2016-4407 disclosed?
CVE-2016-4407 was first published in the National Vulnerability Database on October 13, 2016, 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-2016-4407 actively exploited?
CVE-2016-4407 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-4407?
CVE-2016-4407 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2016-4407?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-4407, 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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