Security readout for executives and security teams
Plain-English summary
CVE-2021-36707 is a command injection flaw in ProLink PRC2402M firmware V1.0.18 and older. A web management CGI function passes user-controlled input directly to a system command function, which could let an attacker run operating-system commands if they can reach and use that interface.
Executive priority
Treat as high priority for any reachable PRC2402M management interface. The absence of CVSS and KEV evidence lowers certainty, not impact. Prioritize inventory, exposure reduction, and vendor-firmware confirmation before broader remediation decisions.
Technical view
The issue is in adm.cgi, specifically set_ledonoff when page is ledonoff. The led_cmd parameter is passed directly to do_system, creating trivial command injection. The public record names ProLink PRC2402M V1.0.18 and older. No CVSS, CWE, fixed version, or authentication context is provided in the source bundle.
Likely exposure
Exposure is most likely limited to ProLink PRC2402M devices running firmware V1.0.18 or older with the web administration CGI reachable. Risk increases materially if the management interface is reachable from untrusted networks, but the sources do not state internet exposure or authentication requirements.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The vulnerability class is serious because command injection can lead to device-level command execution, but exploitability depends on access to the affected adm.cgi management path and any required authentication.
Researcher notes
Evidence is limited to the CVE description and the referenced vulnerability write-up. The key technical claim is direct led_cmd input passed to do_system in set_ledonoff. The public source bundle does not provide patch status, authentication prerequisites, exploit-in-the-wild evidence, or affected CPEs.
Mitigation direction
- Check ProLink or device-maintainer guidance for fixed firmware or advisories.
- Restrict management interface access to trusted administrative networks only.
- Remove any public internet exposure for the administration interface.
- Replace or retire affected devices if no supported fixed firmware exists.
- Monitor management access logs for suspicious adm.cgi ledonoff activity.
Validation and detection
- Inventory ProLink PRC2402M devices and record firmware versions.
- Flag firmware V1.0.18 and older as potentially affected.
- Confirm whether adm.cgi is reachable from untrusted networks.
- Review firewall and access-control rules protecting management access.
- Check logs for unexpected requests involving page ledonoff or led_cmd.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-36707 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ayrx.me/prolink-prc2402m-multiple-vulnerabilities/#ledonoff-command-injectionCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.