CVE-2026-8670
CVE-2026-8670 is a critical-severity vulnerability in Avantra with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-613.
Key facts
- Severity: Critical (CVSS 3.x base score 9.6)
- EPSS exploit prediction: 0% (12th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-31435
- Weakness: CWE-613
- Affected product: Avantra
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2026-8670?
- 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.
- How severe is CVE-2026-8670?
- CVE-2026-8670 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-8670 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-8670?
- CVE-2026-8670 affects Avantra. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-8670?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-8670 have an EU (EUVD) identifier?
- Yes. CVE-2026-8670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-31435.
- When was CVE-2026-8670 published?
- CVE-2026-8670 was published on 2026-05-22 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:avantra:avantra:*:*:*:*:*:*:*:*
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