CVE-2015-5477

HIGHCISA KEVEPSS 100th pctl

7.5

CVSS v3

Description

named in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion failure and daemon exit) via TKEY queries.

CWE-19 CWE-617

How to fix

Remediation Available

bind9Debian

Fixed in:1:9.9.5.dfsg-11CVE-2015-5477

bind9Ubuntu

Fixed in:1:9.9.5.dfsg-3ubuntu0.4USN-2693-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

91.81%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-10-11

References

Related Vulnerabilities

Other CWE-19 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-9034	Medium	5.0	83%	-	Fix
CVE-2016-4977	High	8.8	79%	-	-
CVE-2016-3236	Critical	9.8	77%	-	-
CVE-2014-7141	Medium	6.4	76%	-	Fix
CVE-2015-5374	High	7.8	74%	-	-
CVE-2016-2510	High	8.1	70%	-	Fix

Common questions

How do I fix CVE-2015-5477?

Published advisories record a fix for 2 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2015-5477 being actively exploited?

Yes. CVE-2015-5477 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2026-10-11. Treat it as a priority whatever its CVSS score says.

How severe is CVE-2015-5477?

CVE-2015-5477 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2015-5477 affect?

Published advisories record a fix for bind9 (Debian), bind9 (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This vulnerability is actively exploited in the wild

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-09.