A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The affected software is the firmware on D-Link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers, specifically the ncc2 component that handles the DDNS function. An attacker could exploit this flaw to run arbitrary commands on the router remotely, potentially taking full control of the device, and because these models are end-of-life, D-Link will not release a fix.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A Remote Command Execution (RCE) vulnerability exists in all series H/W revisions D-link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L, and DIR-836L routers via the DDNS function in ncc2 binary file. Note: DIR-810L, DIR-820L, DIR-830L, DIR-826L, DIR-836L, all hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle and as such this issue will not be patched.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- n/a n/a
Version range not reported
References 2
supportannouncement.us.dlink.com
GitHub · doudoudedi/D-LINK_Command_Injection1
Questions about CVE-2021-45382
What does this mean?
The DDNS function in the ncc2 binary does not validate input, so a crafted value can inject operating system commands. That lets an attacker run arbitrary commands on the router.Source: supportannouncement.us.dlink.com
Am I affected, and how do I check?
The facts list D-Link DIR-810L, DIR-820L/LW, DIR-826L, DIR-830L and DIR-836L routers across all hardware revisions. The DDNS function must be reachable for the bug to apply, so check whether DDNS is enabled in the router's web interface and which firmware version it runs.Source: supportannouncement.us.dlink.com
What should I do about it?
No fixed firmware version is listed in the checked facts. Check D-Link's support site for an updated firmware for your model.Source: supportannouncement.us.dlink.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-04-04, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data
What if there's no patch?
Turn off the DDNS function in the router settings while no fix is available. Limiting access to the router's management interface also reduces exposure.Source: supportannouncement.us.dlink.com