CVE-2016-6431

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 7.5Exploit: NoneExposed: 0

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

A vulnerability in the local Certificate Authority (CA) feature of Cisco ASA Software before 9.6(1.5) could allow an unauthenticated, remote attacker to cause a reload of the affected system. The vulnerability is due to improper handling of crafted packets during the enrollment operation. An attacker could exploit this vulnerability by sending a crafted enrollment request to the affected system. An exploit could allow the attacker to cause the reload of the affected system. Note: Only HTTPS packets directed to the Cisco ASA interface, where the local CA is allowing user enrollment, can be used to trigger this vulnerability. This vulnerability affects systems configured in routed firewall mode and in single or multiple context mode.

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%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
83.3%
KEV
Not listed

Published

October 27, 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.

  1. 2026-07-24 14:13 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:23 UTCEG score recompute
  4. 2026-07-22 22:03 UTCEG score recompute
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  1. 2026-07-08 15:10 UTCEPSS rescore
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  24. 2026-06-19 19:23 UTCEPSS rescore
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  36. 2026-06-12 23:09 UTCEPSS rescore
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  51. 2026-05-31 22:28 UTCEPSS rescore
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  53. 2026-05-31 00:14 UTCEPSS rescore
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  63. 2026-05-22 21:15 UTCEPSS rescore
  64. 2026-05-22 18:08 UTCEG score recompute
  65. 2026-05-22 18:08 UTCGHSA enrichment
  66. 2026-05-20 22:37 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2016-6431?
CVE-2016-6431 is a high vulnerability published on October 27, 2016. A vulnerability in the local Certificate Authority (CA) feature of Cisco ASA Software before 9.6(1.5) could allow an unauthenticated, remote attacker to cause a reload of the affected system. The vulnerability is due to improper handling of crafted packets during the enrollment operation. An…
When was CVE-2016-6431 disclosed?
CVE-2016-6431 was first published in the National Vulnerability Database on October 27, 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-2016-6431 actively exploited?
CVE-2016-6431 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 83.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-6431?
CVE-2016-6431 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2016-6431?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-6431, 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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