An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices.
Priority MEDIUM 43CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- 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-787 and the CVSS impact.
Summary
An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. The function do_cgi(), which processes cgi requests supplied to the device's web servers, is vulnerable to a remotely exploitable stack-based buffer overflow. Unauthenticated exploitation is possible by combining this vulnerability with CVE-2020-9277.
Why it matters now
EPSS 0.02601 85th 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-2020-9276
- 2026-10-03 Alias added: GHSA-hfjp-mm4w-hgxg
References
More D-Link Japan K.K. Dsl-2640b Firmware vulnerabilities
- TI-2020-07418 An issue was discovered on D-Link DSL-2640B B2 EU_4.01B devices. CVSS 3.1CRITICAL 9.8
- 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-2012-01173 Cross-site request forgery (CSRF) vulnerability in redpass.cgi in D-Link DSL-2640B… CVSS 2.0MEDIUM 6.8
Sources
- CVE-2020-9276 · CVE Program
- CVE-2020-9276 · NVD
- FIRST EPSS
- GHSA-hfjp-mm4w-hgxg · 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