D-Link DIR-2640-US 1.01B04 is vulnerable to Buffer Overflow.
Priority LOW 32CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
D-Link DIR-2640-US 1.01B04 is vulnerable to Buffer Overflow. There are multiple out-of-bounds vulnerabilities in some processes of D-Link AC2600(DIR-2640). Local ordinary users can overwrite the global variables in the .bss section, causing the process crashes or changes.
Why it matters now
EPSS 0.0054 45th 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:dir-2640-us_firmware:1.01b04:*:*:*:*:*:*:* | 1.01b04 | Vulnerable | D-Link Japan K.K. |
| cpe:2.3:h:dlink:dir-2640-us:-:*:*:*:*:*:*:* | not specified by NVD | Running on | D-Link Japan K.K. |
- cpe:2.3:o:dlink:dir-2640-us_firmware:1.01b04:*:*:*:*:*:*:* Versions 1.01b04 Vulnerable ·D-Link Japan K.K.
- cpe:2.3:h:dlink:dir-2640-us:-:*:*:*:*:*:*:* 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-2021-34201
- 2026-10-03 Alias added: GHSA-rrqf-rmhw-fr5m
References
More D-Link Japan K.K. Dir-2640-us Firmware vulnerabilities
- TI-2021-03434 Path traversal in Quagga Services on D-Link DIR-2640 Routers CVSS 3.1HIGH 8.4
- TI-2021-03432 Hard-coded credentials in Quagga Services on D-Link DIR-2640 Routers CVSS 3.1HIGH 8.8
- TI-2021-13308 There are multiple out-of-bounds vulnerabilities in some processes of D-Link… CVSS 3.1HIGH 7.8
- TI-2021-13309 D-Link DIR-2640-US 1.01B04 is vulnerable to Incorrect Access Control. CVSS 3.1HIGH 8.1
- TI-2021-13310 D-Link DIR-2640-US 1.01B04 is affected by Insufficiently Protected Credentials. CVSS 3.1MEDIUM 6.8
- TI-2021-03433 Path traversal in Quagga Services on D-Link DIR-2640 Routers CVSS 3.1MEDIUM 6.1
Sources
- CVE-2021-34201 · CVE Program
- CVE-2021-34201 · NVD
- FIRST EPSS
- GHSA-rrqf-rmhw-fr5m · GitHub Advisory Database · CC BY 4.0
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