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EVULNABLE
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CVE-2015-5477

ISC — ISC BIND Data Processing Errors Vulnerability

CISA KEV · in the CISA KEV catalog since 2026-10-08

CISA federal deadline · Overdue by 5 daysCISA KEVActively Exploited

What EVULNABLE says

Listed in the CISA KEV catalog, and an EPSS probability of 0.994.

  • CISA KEV: applied
  • Ransomware: did not apply
  • Vendor exploitation: did not apply
  • EPSS: applied
  • Microsoft Exploitability Index: did not apply
  • Pre-patch disclosure: did not apply
  • KEV recency: applied
  • CVSS: applied

Patch Immediately

The priority band answers “how soon”, not “how bad” — see Methodology for what it weighs and where it abstains.

The evidence behind it

MeasureValueSourceWhat it means
CVSS base score 7.5 NVD How severe the flaw is in itself. It does not say how likely an attack is.
FIRST EPSS 0.994 (99.94th pctl) FIRST FIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs.
Actively exploited Confirmed CISA KEV Whether a source of record has confirmed attacks using it in the wild.
Ransomware campaign use Unknown or none CISA KEV Whether CISA has seen ransomware operators use it.
CISA remediation deadline 2026-10-11 — CISA federal deadline · Overdue by 5 days CISA KEV The date US federal agencies must have fixed or mitigated it.
Fixed in bind9 -> 1:9.9.5.dfsg-3ubuntu0.4 | bind9 -> 1:9.9.5.dfsg-11 NVD The version(s) the vendor has published as fixed, where NVD records one.
Public exploit module Public module exists Metasploit Module existing is not the same as active exploitation.
EUVD cross-reference Listed ENISA EUVD ENISA's own vulnerability database entry for this CVE, where one exists.

Impacted software or hardware

  • vm server Software — 3.2
  • clustered data ontap Software
  • dns Software — 9.2.3, 9.3
  • vcx Software — < 9.8.18
  • linux enterprise debuginfo Software — 11
  • bind Software — >= 9.1.0 < 9.9.7, >= 9.10.0 < 9.10.2, 9.10.2
  • junos Operating system — < 12.1, >= 13.1 < 13.2, 12.1, 12.1r, 12.1x44, 12.1x45, 12.1x46, 12.1x47, 12.3, 12.3x48, 12.3x50, 13.2, 13.2x51, 14.1, 14.1x50, 14.1x51, 14.1x53, 14.2, 15.1, 15.1x49, 15.1x53
  • fedora Operating system — 21, 22

+69 more affected products — see the full list at NVD.

Fixed versions: bind9 -> 1:9.9.5.dfsg-3ubuntu0.4 | bind9 -> 1:9.9.5.dfsg-11

Remediation: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Remediation basis: CISA KEV required action

ENISA EUVD also lists this CVE at CVSS 7.5 (v3.1), assigned by mitre. Source: euvd.enisa.europa.eu.

Metasploit lists a public normal-rank module for this CVE: BIND TKEY Query Denial of Service (dos/dns/bind_tkey) — module existing is not the same as active exploitation; see metasploit.com.

8 days recorded, 2026-10-08 to 2026-10-15

99.41% as of 2026-10-15 (99.94th percentile). FIRST EPSS, recorded daily since this page started tracking it.

2026-10-08 2026-10-15

What CISA says to do

The primary records

This page is an opinion about urgency. Where it and a source of record disagree, the source of record is the record.

NVD ↗ CISA KEV ↗ Vendor Advisory ↗

Where this sits

CVE-2015-5477 is one of the entries ranked on the priority feed and in the non-Microsoft advisories.