FirstClass Internet Services server 5.770, and other versions before 6.1, allows remote…
Priority LOW 29Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
FirstClass Internet Services server 5.770, and other versions before 6.1, allows remote attackers to cause a denial of service by sending an email with a long To: mail header.
Why it matters now
EPSS 0.03138 87th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:centrinity:firstclass_intranet_server:5.770:*:*:*:*:*:*:* | 5.770 | Vulnerable | Centrinity |
- cpe:2.3:a:centrinity:firstclass_intranet_server:5.770:*:*:*:*:*:*:* Versions 5.770 Vulnerable ·Centrinity
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2000-0570
- 2026-10-03 Alias added: GHSA-mxfj-2pw5-7crq
References
Other 1
Sources
- CVE-2000-0570 · CVE Program
- CVE-2000-0570 · NVD
- FIRST EPSS
- GHSA-mxfj-2pw5-7crq · GitHub Advisory Database · CC BY 4.0
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