Is itCheck something

No. CVE-2015-5477

Old BIND DNS servers can be knocked offline

Being used now

Yes. Attackers are using this right now.

Teams running older versions of the BIND DNS server.

What to do

Update BIND to a supported version.

Confirmed in attacksOct 8, 2026
ProductISC BIND
GitHub repos5
Attack likelihood, next 30 daysover 99%

Attack likelihood is EPSS, a daily estimate from FIRST.org of how likely this bug is to be used in attacks in the next 30 days.

The official description

ISC BIND contains a data processing errors vulnerability that could allow remote attackers to cause a denial of service via TKEY queries.

For your tech helper or AI assistant

A read-only checklist. Paste it into Claude, ChatGPT or a coding agent; it only looks and changes nothing.

Read-only check, change nothing, send nothing anywhere.
Is ISC BIND (CVE-2015-5477) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2015-5477. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.
Download playbook (.md)

Code on GitHub

Repos named after this bug. Some are scanners or write-ups, some are working attack code. Do not run them on a machine you care about.

Sources