boxscore/security
VENDOR · referenceVendors · latest edition

Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

X-stream

Vendor reference — X-stream · sector: Other. Cumulative disclosure record across the archive.

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Career totals

Disclosures & known-exploited
All-timeYTD
CVEs290
KEV entries10
Rate & severity
KEV/100Med CVSSMed EPSSCHML
3.48.5.152372020

KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over all disclosures. C/H/M/L = disclosures by CVSS severity band.

Monthly disclosures

Trend (by first-seen month, full archive): ▂▂▁▁▇▁▂▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁

Last 12 months (new CVEs by first-seen day)
MonthNew CVEs
2025-110
2025-120
2026-010
2026-020
2026-030
2026-040
2026-050
2026-060
2026-070
2026-080
2026-090
2026-100

Notable CVEs

Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.

Notable (ranked)
CVECVSSEPSS %ileSeverityKEVFirst seen
CVE-2021-391448.599.9HIGHYES2021-08-23
CVE-2020-262178.899.7HIGH—2020-11-16
CVE-2020-262596.899.7MEDIUM—2020-12-16
CVE-2021-213519.199.7CRITICAL—2021-03-22
CVE-2020-262587.799.6HIGH—2020-12-16
CVE-2021-213417.599.6HIGH—2021-03-22
CVE-2021-295058.899.6HIGH—2021-05-28
CVE-2021-213469.899.5CRITICAL—2021-03-22
CVE-2021-213449.899.5CRITICAL—2021-03-22
CVE-2021-213459.999.4CRITICAL—2021-03-22
CVE-2021-213429.198.9CRITICAL—2021-03-22
CVE-2021-213498.698.8HIGH—2021-03-22
CVE-2021-213437.598.8HIGH—2021-03-22
CVE-2021-391418.596.9HIGH—2021-08-23
CVE-2021-213509.896.7CRITICAL—2021-03-22

Recent CVEs

Most recently seen
CVECVSSEPSS %ileSeverityKEVFirst seen
CVE-2021-391548.591.7HIGH—2021-08-23
CVE-2021-391458.590.5HIGH—2021-08-23
CVE-2021-391498.591.7HIGH—2021-08-23
CVE-2021-391488.591.7HIGH—2021-08-23
CVE-2021-391538.591.3HIGH—2021-08-23
CVE-2021-391518.591.7HIGH—2021-08-23
CVE-2021-391468.596.6HIGH—2021-08-23
CVE-2021-391528.596.0HIGH—2021-08-23
CVE-2021-391418.596.9HIGH—2021-08-23
CVE-2021-391508.588.8HIGH—2021-08-23
CVE-2021-391478.591.7HIGH—2021-08-23
CVE-2021-391406.393.2MEDIUM—2021-08-23
CVE-2021-391398.891.5HIGH—2021-08-23
CVE-2021-391448.599.9HIGHYES2021-08-23
CVE-2021-295058.899.6HIGH—2021-05-28

Products

This vendor's products with a reference page (≥2 disclosures), by CVE count. A monolithic vendor total dilutes signal; product pages sharpen it.

Products (by CVE count)
ProductCVEsKEV
Xstream291

KEV entries

CISA Known Exploited Vulnerabilities (newest addition first)
CVEKEV addedCVSSEPSS %ileSeverity
CVE-2021-391442023-03-108.599.9HIGH

KEV timing

Fastest to KEV
CVEDays
CVE-2021-39144564
Longest unpatched (KEV due date passed)
CVEDueDays over
CVE-2021-391442023-03-311298

Methodology

Rate statistics are arithmetic over published figures: KEV/100 = KEV entries ÷ CVEs × 100; medians are taken over this vendor's disclosures. Vendor names are normalized (case, punctuation, common aliases) before aggregation; monthly counts are keyed to first-seen day, the day this archive first observed the record, not the upstream publication date.

Raw counts are not comparable across vendors: disclosure practices, product breadth, and CNA conventions differ widely, so a larger number here does not mean less secure software. This is a reference page assembled from the public record — not a record of its own, and not a ranking of vendors by our judgment.

Sources. CVE records from the CVE Program (cvelistV5); enrichment from NVD (NIST); known-exploited status from the CISA KEV catalog; exploit probability from FIRST EPSS.