CVE-2016-1902

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.9%, top 22% 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 7.5Exploit: NoneExposed: 0

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

The nextBytes function in the SecureRandom class in Symfony before 2.3.37, 2.6.x before 2.6.13, and 2.7.x before 2.7.9 does not properly generate random numbers when used with PHP 5.x without the paragonie/random_compat library and the openssl_random_pseudo_bytes function fails, which makes it easier for attackers to defeat cryptographic protection mechanisms via unspecified vectors.

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%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
77.6%
KEV
Not listed

Published

June 1, 2016

Last Modified

May 6, 2026

References (8)

Affected Packages

(3 across 1 ecosystem)
Packagist(3)
PackageVulnerable rangeFixed inDependents
symfony/securityv2.7.0 ... v2.7.8 (9 versions)2.7.9—
symfony/security-corev2.7.0 ... v2.7.8 (9 versions)2.7.9—
symfony/symfonyv2.7.0 ... v2.7.8 (9 versions)2.7.9—

Data Freshness Timeline

(refreshed 13× in last 7d / 45× 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 103 total refreshes for this CVE.

  1. 2026-07-23 01:22 UTCEG score recompute
  2. 2026-07-22 22:01 UTCEG score recompute
  3. 2026-07-22 14:04 UTCEPSS rescore
  4. 2026-07-21 15:21 UTCEPSS rescore
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  6. 2026-07-20 17:03 UTCEPSS rescore
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  20. 2026-07-12 09:37 UTCOSV refresh
  21. 2026-07-12 05:43 UTCEPSS rescore
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  24. 2026-07-09 19:05 UTCEPSS rescore
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  1. 2026-07-07 13:42 UTCEPSS rescore
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  20. 2026-06-23 15:00 UTCOSV refresh
  21. 2026-06-22 14:23 UTCEPSS rescore
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  24. 2026-06-21 01:57 UTCEPSS rescore
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  26. 2026-06-19 19:23 UTCEPSS rescore
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  28. 2026-06-18 17:50 UTCEPSS rescore
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  42. 2026-06-08 14:14 UTCEPSS rescore
  43. 2026-06-07 15:22 UTCEPSS rescore
  44. 2026-06-07 15:22 UTCEPSS rescore
  45. 2026-06-06 19:29 UTCOSV refresh
  46. 2026-06-06 13:45 UTCEPSS rescore
  47. 2026-06-05 22:44 UTCEPSS rescore
  48. 2026-06-05 06:08 UTCEPSS rescore
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  67. 2026-05-22 21:15 UTCEPSS rescore
  68. 2026-05-22 20:09 UTCEG score recompute
  69. 2026-05-21 22:40 UTCEPSS rescore
  70. 2026-05-21 22:36 UTCOSV refresh
  71. 2026-05-20 22:37 UTCEPSS rescore
  72. 2026-05-20 22:37 UTCEPSS rescore
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  74. 2026-05-20 11:21 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2016-1902?
CVE-2016-1902 is a high vulnerability published on June 1, 2016. The nextBytes function in the SecureRandom class in Symfony before 2.3.37, 2.6.x before 2.6.13, and 2.7.x before 2.7.9 does not properly generate random numbers when used with PHP 5.x without the paragonie/randomcompat library and the opensslrandompseudobytes function fails, which makes it easier…
When was CVE-2016-1902 disclosed?
CVE-2016-1902 was first published in the National Vulnerability Database on June 1, 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-2016-1902 actively exploited?
CVE-2016-1902 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 77.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-1902?
CVE-2016-1902 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2016-1902?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-1902, 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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