CVE-2015-8331

HIGHNVD 7.47.4—
EchelonGraph scoreMEDIUM confidence

Score 7.4 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.4Exploit: None knownExposed: 0

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

The Operation and Maintenance Unit (OMU) in Huawei VCN500 with software before V100R002C00SPC200 does not properly invalidate the session ID when an "abnormal exit" occurs, which allows remote attackers to conduct replay attacks via the session ID.

CVSS v3
7.4
EG Score
7.4(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity74% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

January 11, 2016

Last Modified

June 17, 2026

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 25× 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 120 total refreshes for this CVE.

  1. 2026-08-20 22:50 UTCEPSS rescore
  2. 2026-08-19 16:59 UTCEPSS rescore
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  24. 2026-07-23 01:20 UTCEG score recompute
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  1. 2026-07-22 21:59 UTCEG score recompute
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  74. 2026-05-31 22:28 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2015-8331?
CVE-2015-8331 is a high vulnerability published on January 11, 2016. The Operation and Maintenance Unit (OMU) in Huawei VCN500 with software before V100R002C00SPC200 does not properly invalidate the session ID when an "abnormal exit" occurs, which allows remote attackers to conduct replay attacks via the session ID.
When was CVE-2015-8331 disclosed?
CVE-2015-8331 was first published in the National Vulnerability Database on January 11, 2016, 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-2015-8331 actively exploited?
CVE-2015-8331 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 44.8% of all scored CVEs.
What is the CVSS score of CVE-2015-8331?
CVE-2015-8331 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2015-8331?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-8331, 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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