CVE•Published 2026-05-20•Modified 2026-09-17•0 articles on news•5 live references•NVD data

CVE-2026-3039Isc · Bind

Vulnerability data via NVD (ingested)

CVSS v3.1

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS percentile

Exploit Prediction Scoring System · top 38% of all CVEs

Weaknesses (CWE)

CWE-771Missing Reference to Active Allocated Resource CWE-770Allocation of Resources Without Limits or Throttling

Description

BIND servers that are configured to use TKEY-based authentication via GSS-API tokens are vulnerable to excessive memory consumption when receiving and processing maliciously-constructed packets. Typically these servers will be found in Active Directory integrated DNS deployments and/or Kerberos-secured DNS environments. This issue affects BIND 9 versions 9.0.0 through 9.16.50, 9.18.0 through 9.18.48, 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, 9.9.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.

Timeline

Published 2026-05-20

Modified 2026-09-17

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common). Live host counts are a Premium feature.

Shodan · vuln tag

vuln:CVE-2026-3039

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Isc Bind"

All exposed Isc Bind instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Bind"

HTTP body or banner mentions "Bind" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-3039