Zhone GPON 2520 with firmware R4.0.2.566b allows remote attackers to cause a denial of…
Priority MEDIUM 40CWE-20Published · 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 · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Zhone GPON 2520 with firmware R4.0.2.566b allows remote attackers to cause a denial of service via a long string in the oldpassword parameter.
Why it matters now
EPSS 0.03034 87th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and 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 · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zhone_technologies:gpon_2520_firmware:r4.0.2.566b:*:*:*:*:*:*:* | r4.0.2.566b | Vulnerable | Zhone Technologies |
| cpe:2.3:h:zhone_technologies:gpon_2520:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zhone Technologies |
- cpe:2.3:o:zhone_technologies:gpon_2520_firmware:r4.0.2.566b:*:*:*:*:*:*:* Versions r4.0.2.566b Vulnerable ·Zhone Technologies
- cpe:2.3:h:zhone_technologies:gpon_2520:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zhone Technologies
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-2055
- 2026-10-03 Alias added: GHSA-wpfg-h6pp-74wp
References
Exploit 1
Sources
- CVE-2015-2055 · CVE Program
- CVE-2015-2055 · NVD
- FIRST EPSS
- GHSA-wpfg-h6pp-74wp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences