CVE-2026-8670

CRITICALPre-NVD 9.69.6—Trending — 3 sources updated this week

9.6

Insufficient session expiration vulnerability in syslink software AG Avantra on Linux, Windows...

Insufficient session expiration vulnerability in syslink software AG Avantra on Linux, Windows allows Reusing Session IDs (aka Session Replay).

This issue affects Avantra: before 25.3.1.

CVSS v3: 9.6
EG Score: 9.6(high)
EPSS: 12.8%
KEV: Not listed

Published

May 26, 2026

Last Modified

May 26, 2026

Vendor Advisories for CVE-2026-8670(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

GHSA-rvw7-wx4g-rq78
GitHub Security AdvisoriesCritical
Insufficient session expiration vulnerability in syslink software AG Avantra on Linux, Windows...

Weakness Classification(1)

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

CWE-613Insufficient Session Expiration

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:44 UTCepss_batch
2026-05-26 13:35 UTCEG score recompute
2026-05-26 13:35 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-8670?

CVE-2026-8670 is a critical vulnerability published on May 26, 2026. Insufficient session expiration vulnerability in syslink software AG Avantra on Linux, Windows... Insufficient session expiration vulnerability in syslink software AG Avantra on Linux, Windows allows Reusing Session IDs (aka Session Replay). This issue affects Avantra: before 25.3.1.

When was CVE-2026-8670 disclosed?

CVE-2026-8670 was first published in the National Vulnerability Database on May 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-8670 actively exploited?

CVE-2026-8670 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-8670?

CVE-2026-8670 has a CVSS v3 base score of 9.6 (NVD).

How do I remediate CVE-2026-8670?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8670, 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.

Dependency Blast Radius

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CVE-2026-8670

📅 Published

🔄 Last Modified

📣 Vendor Advisories for CVE-2026-8670(1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-8670?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

Vendor Advisories for CVE-2026-8670(1)

Frequently asked(5)

Related CVEs(same CWE)