An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices.
Priority MEDIUM 47CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. Authentication can be bypassed when accessing cgi modules. This allows one to perform administrative tasks (e.g., modify the admin password) with no authentication.
Why it matters now
EPSS 0.02464 84th 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 · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:dlink:dsl-2640b_firmware:eu_4.01b:*:*:*:*:*:*:* | eu_4.01b | Vulnerable | D-Link Japan K.K. |
| cpe:2.3:h:dlink:dsl-2640b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | D-Link Japan K.K. |
- cpe:2.3:o:dlink:dsl-2640b_firmware:eu_4.01b:*:*:*:*:*:*:* Versions eu_4.01b Vulnerable ·D-Link Japan K.K.
- cpe:2.3:h:dlink:dsl-2640b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·D-Link Japan K.K.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-9277
- 2026-10-03 Alias added: GHSA-4vh6-rxvj-rwh4
References
More D-Link Japan K.K. Dsl-2640b Firmware vulnerabilities
- TI-2020-07420 An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. CVSS 3.1CRITICAL 9.8
- TI-2020-07416 An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. CVSS 3.1CRITICAL 9.8
- TI-2020-07419 An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. CVSS 3.1CRITICAL 9.1
- TI-2020-07417 An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. CVSS 3.1HIGH 8.8
- TI-2012-01173 Cross-site request forgery (CSRF) vulnerability in redpass.cgi in D-Link DSL-2640B… CVSS 2.0MEDIUM 6.8
Sources
- CVE-2020-9277 · CVE Program
- CVE-2020-9277 · NVD
- FIRST EPSS
- GHSA-4vh6-rxvj-rwh4 · 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