# Isc vulnerabilities

Source: https://junglewise.ai/threats/vendors/isc  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/isc.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 51 vulnerabilities in Isc: 0 in the last 7 days and 19 in the last 90 days, 4 of them critical and 1 exploited in the wild. The most recent, CVE-2026-97313, was published on 21 October 2026. 4 vulnerabilities in the last four weeks, down 73% on the four before (15). 0 critical against 1, 0 exploited in the wild against 1. 4 technologies have a page of their own.

## Counts

- Last 7 days: 0
- Last 30 days: 4
- Last 90 days: 19
- All time: 51 (4 critical, 1 exploited in the wild)

## About Isc

Internet Systems Consortium (ISC) is a non-profit organization that develops and maintains core Internet software and infrastructure.

## Latest Isc vulnerabilities

- [CVE-2026-97313: ISC BIND recursive server assert failure denial of service](https://junglewise.ai/threats/cve-2026-97313-a-recursive-bind-server-that-receives-a-query-with-recursion) (high, CVSS 7.5, published 21 Oct 2026)
- [CVE-2026-96888: BIND assertion failure with redirect zone and qname-minimization](https://junglewise.ai/threats/cve-2026-96888-a-bind-resolver-that-is-configured-with-both-a-redirect-zone-and) (high, CVSS 7.5, published 21 Oct 2026)
- [CVE-2026-94300: BIND named GSS-TSIG replay heap corruption](https://junglewise.ai/threats/cve-2026-94300-replaying-gss-tsig-signed-udp-messages-can-result-in-memory) (high, CVSS 8.1, published 21 Oct 2026)
- [CVE-2026-19630: ISC BIND resolver DNS message processing denial of service](https://junglewise.ai/threats/cve-2026-19630-in-a-bind-resolver-inbound-dns-protocol-messages-with-a) (high, CVSS 7.5, published 21 Oct 2026)
- [CVE-2015-5477: ISC BIND denial of service via TKEY queries](https://junglewise.ai/threats/cve-2015-5477-isc-bind-data-processing-errors-vulnerability) (critical, exploited in the wild, published 8 Oct 2026)
- [CVE-2026-80274: BIND resolver crash on DNSSEC-signed wildcard with NSEC mismatch](https://junglewise.ai/threats/cve-2026-80274-bind-resolver-crash-on-dnssec-signed-wildcard-with-nsec-mismatch) (high, CVSS 7.5, published 16 Sep 2026)
- [CVE-2026-77119: ISC BIND DNSSEC validation bypass with NSEC3 forgery](https://junglewise.ai/threats/cve-2026-77119-isc-bind-dnssec-validation-bypass-with-nsec3-forgery) (medium, CVSS 5.9, published 16 Sep 2026)
- [CVE-2026-76163: ISC BIND assertion failure in TKEY query handling](https://junglewise.ai/threats/cve-2026-76163-isc-bind-assertion-failure-in-tkey-query-handling) (high, CVSS 7.5, published 16 Sep 2026)
- [CVE-2026-75029: ISC BIND DNS cache memory exhaustion in query responses](https://junglewise.ai/threats/cve-2026-75029-isc-bind-dns-cache-memory-exhaustion-in-query-responses) (medium, CVSS 5.3, published 16 Sep 2026)
- [CVE-2026-19668: ISC BIND recursive resolver excessive resource consumption on invalid DNSSEC records](https://junglewise.ai/threats/cve-2026-19668-isc-bind-recursive-resolver-excessive-resource-consumption-on) (medium, CVSS 5.3, published 16 Sep 2026)
- [CVE-2026-19666: ISC BIND dns64 malformed answer crash](https://junglewise.ai/threats/cve-2026-19666-isc-bind-dns64-malformed-answer-crash) (high, CVSS 7.5, published 16 Sep 2026)
- [CVE-2026-19033: ISC BIND named TSIG signature validation bypass in zone transfers](https://junglewise.ai/threats/cve-2026-19033-isc-bind-named-tsig-signature-validation-bypass-in-zone-transfers) (medium, CVSS 6.5, published 16 Sep 2026)
- [CVE-2026-81736: ISC BIND DNS resolver high CPU consumption via cached SVCB/HTTPS AliasMode records](https://junglewise.ai/threats/cve-2026-81736-isc-bind-dns-resolver-high-cpu-consumption-via-cached-svcb-https) (high, CVSS 7.5, published 16 Sep 2026)
- [CVE-2026-81563: ISC BIND resolver resource exhaustion via SVCB/HTTPS AliasMode](https://junglewise.ai/threats/cve-2026-81563-isc-bind-resolver-resource-exhaustion-via-svcb-https-aliasmode) (high, CVSS 7.5, published 16 Sep 2026)
- [CVE-2026-78301: ISC BIND named zone parsing vulnerability](https://junglewise.ai/threats/cve-2026-78301-isc-bind-named-zone-parsing-vulnerability) (medium, CVSS 5.8, published 16 Sep 2026)
- [CVE-2026-77692: ISC BIND DNS service denial of service via crafted DNS-over-HTTPS request](https://junglewise.ai/threats/cve-2026-77692-isc-bind-dns-service-denial-of-service-via-crafted-dns-over-https) (high, CVSS 7.5, published 16 Sep 2026)
- [CVE-2026-19941: ISC BIND named NSEC wildcard masking vulnerability](https://junglewise.ai/threats/cve-2026-19941-isc-bind-named-nsec-wildcard-masking-vulnerability) (medium, CVSS 5.9, published 16 Sep 2026)
- [CVE-2026-19667: ISC BIND named negative cache denial of service](https://junglewise.ai/threats/cve-2026-19667-isc-bind-named-negative-cache-denial-of-service) (high, CVSS 7.5, published 16 Sep 2026)
- [CVE-2026-19662: ISC BIND named resolver use-after-free denial of service](https://junglewise.ai/threats/cve-2026-19662-isc-bind-named-resolver-use-after-free-denial-of-service) (medium, CVSS 5.9, published 16 Sep 2026)
- [CVE-2026-18103: dhcp-server buffer overflow in OMAPI handler](https://junglewise.ai/threats/cve-2026-18103-dhcp-server-buffer-overflow-in-omapi-handler) (medium, CVSS 4.9, published 5 Aug 2026)
- [CVE-2026-13321: ISC BIND DNSSEC validation bypass in NSEC records](https://junglewise.ai/threats/cve-2026-13321-isc-bind-dnssec-validation-bypass-in-nsec-records) (high, CVSS 8.6, published 22 Jul 2026)
- [CVE-2026-13204: ISC BIND 9 denial of service via NSEC and NSEC3 assertion failure](https://junglewise.ai/threats/cve-2026-13204-isc-bind-9-denial-of-service-via-nsec-and-nsec3-assertion-failure) (high, CVSS 7.5, published 22 Jul 2026)
- [CVE-2026-12617: ISC BIND 9 denial of service via CNAME or DNAME record ordering](https://junglewise.ai/threats/cve-2026-12617-isc-bind-9-denial-of-service-via-cname-or-dname-record-ordering) (high, CVSS 7.5, published 22 Jul 2026)
- [CVE-2026-11721: ISC BIND 9 cache poisoning via RRSIG label count discrepancy](https://junglewise.ai/threats/cve-2026-11721-isc-bind-9-cache-poisoning-via-rrsig-label-count-discrepancy) (high, CVSS 7.5, published 22 Jul 2026)
- [CVE-2026-11622: ISC BIND 9 resource exhaustion in DNSSEC validating resolver](https://junglewise.ai/threats/cve-2026-11622-isc-bind-9-resource-exhaustion-in-dnssec-validating-resolver) (high, CVSS 7.5, published 22 Jul 2026)

## Most severe Isc vulnerabilities

- [CVE-2015-5477: ISC BIND denial of service via TKEY queries](https://junglewise.ai/threats/cve-2015-5477-isc-bind-data-processing-errors-vulnerability) (critical, exploited in the wild, published 8 Oct 2026)
- [CVE-1999-0009: ISC BIND buffer overflow in inverse query handling](https://junglewise.ai/threats/cve-1999-0009-isc-bind-buffer-overflow-in-inverse-query-handling) (critical, CVSS 10, published 8 Apr 1998)
- [CVE-1999-0100: IBM AIX innd remote access via control messages](https://junglewise.ai/threats/cve-1999-0100-ibm-aix-innd-remote-access-via-control-messages) (critical, CVSS 10, published 1 Jan 1997)
- [CVE-1999-0043: ISC InterNetNews innd command injection via control messages](https://junglewise.ai/threats/cve-1999-0043-isc-internetnews-innd-command-injection-via-control-messages) (critical, CVSS 9.8, published 4 Dec 1996)
- [CVE-2026-13321: ISC BIND DNSSEC validation bypass in NSEC records](https://junglewise.ai/threats/cve-2026-13321-isc-bind-dnssec-validation-bypass-in-nsec-records) (high, CVSS 8.6, published 22 Jul 2026)
- [CVE-2026-94300: BIND named GSS-TSIG replay heap corruption](https://junglewise.ai/threats/cve-2026-94300-replaying-gss-tsig-signed-udp-messages-can-result-in-memory) (high, CVSS 8.1, published 21 Oct 2026)
- [CVE-2025-13878: ISC BIND 9 denial of service via malformed BRID or HHIT records](https://junglewise.ai/threats/cve-2025-13878-isc-bind-9-denial-of-service-via-malformed-brid-or-hhit-records) (high, CVSS 7.5, published 21 Jan 2026)
- [CVE-2026-3608: ISC Kea stack overflow in multiple daemons via API socket](https://junglewise.ai/threats/cve-2026-3608-isc-kea-stack-overflow-in-multiple-daemons-via-api-socket) (high, CVSS 7.5, published 25 Mar 2026)
- [CVE-2026-81736: ISC BIND DNS resolver high CPU consumption via cached SVCB/HTTPS AliasMode records](https://junglewise.ai/threats/cve-2026-81736-isc-bind-dns-resolver-high-cpu-consumption-via-cached-svcb-https) (high, CVSS 7.5, published 16 Sep 2026)
- [CVE-2026-80274: BIND resolver crash on DNSSEC-signed wildcard with NSEC mismatch](https://junglewise.ai/threats/cve-2026-80274-bind-resolver-crash-on-dnssec-signed-wildcard-with-nsec-mismatch) (high, CVSS 7.5, published 16 Sep 2026)

## Vulnerabilities per week

4 vulnerabilities in the last four weeks, down 73% on the four before (15). 0 critical against 1, 0 exploited in the wild against 1.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 14 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 1 | 1 | 1 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 4 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Isc technologies

- [Isc BIND](https://junglewise.ai/threats/technologies/bind): 23 vulnerabilities
- [Isc BIND 9](https://junglewise.ai/threats/technologies/bind-9): 21 vulnerabilities
- [Isc BIND 9 Supported Preview Edition](https://junglewise.ai/threats/technologies/bind-9-supported-preview-edition): 5 vulnerabilities
- [Isc InterNetNews](https://junglewise.ai/threats/technologies/internetnews): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Isc vulnerabilities", https://junglewise.ai/threats/vendors/isc, 9 November 2026.