Lead · Vulnerabilities
Five remote holes in a router that has no one left to fix it
Five D-Link DIR-878 CVEs landed together with public exploit code and no patch, because the product is past support — and the commodity botnets are having a busy week.
The batch is CVE-2026-124560 through CVE-2026-124564, all against D-Link DIR-878 1.20B05, all in the HNAP handler, all remote. A heap-based buffer overflow in GetCAPTCHAsetting, rated critical with remote code execution risk. A stack-based overflow in SetVLANSettings in prog.cgi via the VID argument. Two more overflows in SetWanSettings, one via Primary/Secondary and one via ConfigDNS/Primary/ConfigDNS/Secondary. And a path traversal in GetListDirectory via ListDirectoryPath. The advisories note the exploits have been publicly disclosed and may be used, and that the vulnerabilities only affect products no longer supported by the maintainer. The public write-up's remediation advice is, in full: isolate or decommission unsupported routers.
End of life is a status in a spreadsheet. It is not a status in physics. The router does not know it has been discontinued; it is still answering HNAP requests with the same cheerful competence it had in its first week, the way a fridge whose warranty expired in 2019 keeps the milk cold and keeps drawing current and keeps being, technically, a fire. The only thing that has ended is the possibility of anybody fixing it. Which means the patch cycle for this device is not a patch cycle. It is a skip.
In the same window our feeds carried eleven new Mirai indicators, eighty-six new Mozi indicators, and a steady drip of Mirai sample hashes into ThreatFox. Nobody has shown us HNAP exploit traffic against these five CVEs yet, and we are not going to pretend otherwise. We are simply noting that unauthenticated remote code execution on an unsupported consumer router, with working exploits in public, has one well-established career path, and it does not involve a responsible disclosure timeline.
Why it mattersIf a DIR-878 is on your estate or on a home-worker's desk with a management path into anything, there is no patch coming; the only controls available today are network isolation and a bin.
- 1Telegram🚨 CVE-2026-124561 A vulnerability was determined in…
- 2Telegram🚨 CVE-2026-124564 A weakness has been identified in…
- 3Telegram🚨 CVE-2026-124563 A security flaw has been discover…
- 4Telegram🚨 CVE-2026-124562 A vulnerability was identified in…
- 5infosec.exchangeCVE-2026-124560 – D-Link DIR-878 v1.20B05 hit by CR…