D-Link DIR-645 1.03 A1 is vulnerable to Buffer Overflow.
Priority MEDIUM 48CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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
D-Link DIR-645 1.03 A1 is vulnerable to Buffer Overflow. The hnap_main function in the cgibin handler uses sprintf to format the soapaction header onto the stack and has no limit on the size.
Why it matters now
EPSS 0.03162 88th 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-645_firmware:1.03:*:*:*:*:*:*:* | 1.03 | Vulnerable | D-Link Japan K.K. |
| cpe:2.3:h:dlink:dir-645:a1:*:*:*:*:*:*:* | a1 | Running on | D-Link Japan K.K. |
- cpe:2.3:o:dlink:dir-645_firmware:1.03:*:*:*:*:*:*:* Versions 1.03 Vulnerable ·D-Link Japan K.K.
- cpe:2.3:h:dlink:dir-645:a1:*:*:*:*:*:*:* Versions a1 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-2021-43722
- 2026-10-03 Alias added: GHSA-g42p-p7j5-qqx7
References
More D-Link Japan K.K. Dir-645 Firmware vulnerabilities
- TI-2015-01840 The D-Link DIR-645 Wired/Wireless Router Rev. KEVCVSS 3.1HIGH 8.8
- TI-2022-22965 D-Link DIR 645A1 1.06B01_Beta01 was discovered to contain a stack overflow via the… CVSS 3.1CRITICAL 9.8
- TI-2013-06123 An issue was discovered in soap.cgi?service=WANIPConn1 on D-Link DIR-845 before v1.02b03… CVSS 3.1CRITICAL 9.8
- TI-2018-15341 D-Link DIR-110/412/600/615/645/815 RCE via service.cgi CVSS 4.0CRITICAL 10.0
- TI-2025-09786 D-Link DIR-645 soap.cgi soapcgi_main command injection CVSS 4.0MEDIUM 5.3
- TI-2025-06554 D-Link DIR-645 ssdpcgi cgibin ssdpcgi_main command injection CVSS 4.0MEDIUM 5.3
Sources
- CVE-2021-43722 · CVE Program
- CVE-2021-43722 · NVD
- FIRST EPSS
- GHSA-g42p-p7j5-qqx7 · GitHub Advisory Database · CC BY 4.0
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