Is CVE-2015-5477 being actively exploited?

Yes. CVE-2015-5477 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on October 8, 2026.

What is the CVSS score for CVE-2015-5477?

CVE-2015-5477 has a CVSS 3.1 base score of 7.5 (HIGH).

CVE-2015-5477

HIGH · CVSS 7.5CISA KEV: actively exploitedEPSS 99.4%EU EUVD: exploited

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.

Key facts

CVSS score: 7.5 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-19
EPSS score: 99.4% (100th percentile)
In CISA KEV: Yes, added October 8, 2026
In EU EUVD: Yes (EUVD-2015-5432)
Published: July 29, 2015
NVD last modified: October 9, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

ISC BIND Data Processing Errors Vulnerability

Added to the KEV catalog on October 8, 2026; federal remediation due October 11, 2026.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2015-5432 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 9, 2026.

View on the EU Vulnerability Database

Affected products

apple / os x server
canonical / ubuntu linux
debian / debian linux
debian / debian linux
fedoraproject / fedora
fedoraproject / fedora
hp / hp-ux
hp / hp-ux
hp / hp-ux
hp / openvms
hpe / dns
hpe / dns
hpe / j9668a
hpe / j9669a
hpe / j9672a
hpe / jc516a
hpe / jc517a
hpe / jc518a
hpe / jd023a
hpe / jd024a
hpe / jd025a
hpe / jd026a
hpe / jd027a
hpe / jd028a
hpe / jd029a
hpe / je252a
hpe / je253a
hpe / je254a
hpe / je340a
hpe / je341a
hpe / je342a
hpe / je355a
hpe / vcx
isc / bind
isc / bind
juniper / j2300
juniper / j2320
juniper / j2350
juniper / j4300
juniper / j4350
juniper / j4350 nebs
juniper / j6300
juniper / j635 nebs
juniper / j6350
juniper / junos
juniper / junos
juniper / junos
juniper / junos
juniper / junos
juniper / junos

and 158 more…

Certified products that may be affected

10 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux libgcrypt Cryptographic Module v4.0 [1] and Red Hat Enterprise Linux libgcrypt Cryptographic Module v5.0 [2] - Red Hat®, Inc. - FIPS 140 2657 - historical
SUSE Linux Enterprise Server Version 12 - SUSE LLC - Common Criteria BSI-DSZ-CC-0962-2016 - archived
SUSE Linux Enterprise Server 11 Service Pack 2 on IBM System z - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0852-2013 - archived
SUSE Linux Enterprise Server 11 Service Pack 2 including KVM virtualization - SUSE Linux Products Gmbh - Common Criteria BSI-DSZ-CC-0787-2013 - archived
Red Hat Enterprise Linux 5 OpenSSH-Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 1384 - historical

See all 10 in the Security Certifications Explorer.

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10718(Mitigation, Third Party Advisory)
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163006.html(Mailing List, Third Party Advisory)
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163007.html(Mailing List, Third Party Advisory)
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163015.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00043.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00044.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00045.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00048.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00050.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00001.html(Mailing List, Third Party Advisory)
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00033.html(Mailing List, Third Party Advisory)
http://marc.info/?l=bugtraq&m=144000632319155&w=2(Mailing List, Third Party Advisory)
http://marc.info/?l=bugtraq&m=144017354030745&w=2(Mailing List, Third Party Advisory)
http://marc.info/?l=bugtraq&m=144181171013996&w=2(Mailing List, Third Party Advisory)
http://marc.info/?l=bugtraq&m=144294073801304&w=2(Mailing List, Third Party Advisory)
http://packetstormsecurity.com/files/132926/BIND-TKEY-Query-Denial-Of-Service.html(Third Party Advisory, VDB Entry)
http://rhn.redhat.com/errata/RHSA-2015-1513.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2015-1514.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2015-1515.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2016-0078.html(Third Party Advisory)
http://rhn.redhat.com/errata/RHSA-2016-0079.html(Third Party Advisory)
http://www.debian.org/security/2015/dsa-3319(Mailing List, Third Party Advisory)
http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html(Third Party Advisory)
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html(Third Party Advisory)
http://www.securityfocus.com/bid/76092(Third Party Advisory)
http://www.securitytracker.com/id/1033100(Broken Link)
http://www.ubuntu.com/usn/USN-2693-1(Third Party Advisory)
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04789415(Third Party Advisory)
https://h20564.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c04952480(Third Party Advisory)
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05095918(Third Party Advisory)
https://kb.isc.org/article/AA-01272(Patch, Vendor Advisory, Broken Link)
https://kb.isc.org/article/AA-01305(Broken Link)
https://kb.isc.org/article/AA-01306(Broken Link)
https://kb.isc.org/article/AA-01307(Broken Link)
https://kb.isc.org/article/AA-01438(Broken Link)
https://kb.juniper.net/JSA10783(Third Party Advisory)
https://kc.mcafee.com/corporate/index?page=content&id=SB10126(Broken Link)
https://security.gentoo.org/glsa/201510-01(Third Party Advisory)
https://security.netapp.com/advisory/ntap-20160114-0001/(Third Party Advisory)
https://support.apple.com/kb/HT205032(Third Party Advisory)

Last updated October 11, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain