CVE-2022-36756
Published: 28 August 2022
Summary
CVE-2022-36756 is a critical-severity Code Injection (CWE-94) vulnerability in Dlink Dir-845L Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 7.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2022-36756 is a command injection vulnerability affecting the D-Link DIR845L A1 router in firmware versions 1.00 through 1.03. The flaw resides in the /htdocs/upnpinc/gena.php component and is classified under CWE-94, with a CVSS 3.1 base score of 9.8 reflecting network-accessible exploitation without authentication or user interaction.
Unauthenticated remote attackers can send specially crafted requests to the affected endpoint to inject and execute arbitrary operating-system commands. Successful exploitation grants full control over the device, enabling confidentiality, integrity, and availability impacts.
D-Link has published a security bulletin addressing the issue at https://www.dlink.com/en/security-bulletin/. The EPSS score rose from lower values to a peak of 0.1812 on 2025-12-11 before receding to the current 0.0769, indicating a period of increased exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-39456
Vulnerability details
DIR845L A1 v1.00-v1.03 is vulnerable to command injection via /htdocs/upnpinc/gena.php.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Makes persistent code injection into loaded programs impossible when the executable image itself resides on hardware-protected read-only media.
Dynamically generated code can be produced and executed inside the isolated chamber, preventing host compromise from code-injection payloads.
Validates inputs used in dynamic code generation to block injected directives.
Directly prevents execution of attacker-supplied code written into data memory regions.