How many CVEs does ISC have?

ISC has 259 published CVE records since 1999, including 26 in the last two years.

How many ISC CVEs are in CISA KEV?

None of ISC's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.

Which ISC products have the most CVEs?

The ISC products with the most published CVEs are BIND, BIND 9, dhcp, BIND9, inn.

What are the most common weakness types in ISC CVEs?

ISC's CVEs most often map to these CWE weakness types: CWE-617 (Reachable Assertion), CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-401 (Missing Release of Memory after Effective Lifetime), CWE-405 (Asymmetric Resource Consumption (Amplification)).

Are there public exploits for ISC vulnerabilities?

Yes — 27 of ISC's CVEs have a known public exploit.

How many critical ISC vulnerabilities are there?

ISC has 19 critical and 131 high-severity CVEs.

What is the average severity of ISC CVEs?

The average CVSS base score across ISC's scored CVEs is 6.8.

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259 CVEs

ISC Vulnerabilities

Name: ISC vulnerability dataset (CVEs)
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

CVE security advisories and vulnerability history for ISC.

259

Total CVEs

Published

0

In CISA KEV

Exploited in the wild

27

Public exploits

PoC or exploit code

6.8

Avg CVSS

1999–2026

Overview

ISC has 259 published CVE records since 1999, of which 0 are in CISA's Known Exploited Vulnerabilities catalog and 27 have a known public exploit. The average CVSS base score across scored CVEs is 6.8.

This page aggregates every publicly disclosed vulnerability (CVE) affecting ISC products, with severity breakdowns, the most-affected products, the most common weakness types, and the latest disclosures.

Security scorecard

A quick read on ISC's vulnerability posture, as a share of its 259 published CVEs.

Average CVSS: 6.8
Critical / high: 58%
Actively exploited (KEV): 0%
Public exploit available: 10%
Patch available: 77%

Severity and exploitation

How the CVSS severity of ISC's CVEs breaks down, plus how many are exploited in the wild or have public exploit code.

Critical19

High131

Medium102

Low7

In CISA’s Known Exploited Vulnerabilities catalog

0

None of ISC's CVEs are currently listed in CISA's KEV catalog.

Public exploits

27

27 of ISC's CVEs have a known public exploit available.

Most affected products

The ISC products with the most published CVEs. Follow any product to browse its versions and vulnerabilities.

Common weakness types

The CWE weakness categories most often found in ISC CVEs. Follow any weakness for its full explanation.

CNAs that assign these CVEs

The CVE Numbering Authorities that publish ISC CVE records.

Disclosure activity by year

How many ISC CVEs were published each year.

2019

37

2020

9

2021

7

2022

13

2023

9

2024

12

2025

14

2026

12

Latest ISC CVEs

The most recently disclosed vulnerabilities affecting ISC.

Unbounded resend loop in BIND 9 resolver
CWE-606
Medium · CVSS 5.3
EPSS 0.6%2026-05-20
SIG(0) validation during query flood may lead to undefined behavior
CWE-362
High · CVSS 7.5
EPSS 1.4%2026-05-20
Invalid handling of CLASS != IN
CWE-20
High · CVSS 7.5
EPSS 1.8%2026-05-20
Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation
CWE-416
Critical · CVSS 9.8
EPSS 1.8%2026-05-20
Amplification vulnerabilities via self-pointed glue records
CWE-408
Medium · CVSS 5.3
EPSS 0.4%2026-05-20
BIND 9 server memory exhaustion during GSS-API TKEY negotiation
CWE-771
High · CVSS 7.5
EPSS 1.0%2026-05-20
A stack use-after-return flaw in SIG(0) handling code may enable ACL bypass
CWE-562
Medium · CVSS 5.4
EPSS 0.4%2026-03-25
Authenticated query containing a TKEY record may cause named to terminate unexpectedly
CWE-617
Medium · CVSS 6.5
EPSS 0.6%2026-03-25
Memory leak in code preparing DNSSEC proofs of non-existence
CWE-772
High · CVSS 7.5
EPSS 0.7%2026-03-25
Excessive NSEC3 iterations cause high CPU load during insecure delegation validation
CWE-606
High · CVSS 7.5
EPSS 1.5%2026-03-25
Stack overflow in Kea daemons
CWE-617
High · CVSS 7.5
EPSS 1.4%2026-03-25
Malformed BRID/HHIT records can cause named to terminate unexpectedly
CWE-617
High · CVSS 7.5
EPSS 8.2%2026-01-21

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Frequently asked questions

Common questions about ISC vulnerabilities.

How many CVEs does ISC have?: ISC has 259 published CVE records since 1999, including 26 in the last two years.
How many ISC CVEs are in CISA KEV?: None of ISC's CVEs are currently listed in CISA's Known Exploited Vulnerabilities catalog.
Which ISC products have the most CVEs?: The ISC products with the most published CVEs are BIND, BIND 9, dhcp, BIND9, inn.
What are the most common weakness types in ISC CVEs?: ISC's CVEs most often map to these CWE weakness types: CWE-617 (Reachable Assertion), CWE-770 (Allocation of Resources Without Limits or Throttling), CWE-401 (Missing Release of Memory after Effective Lifetime), CWE-405 (Asymmetric Resource Consumption (Amplification)).
Are there public exploits for ISC vulnerabilities?: Yes — 27 of ISC's CVEs have a known public exploit.
How many critical ISC vulnerabilities are there?: ISC has 19 critical and 131 high-severity CVEs.
What is the average severity of ISC CVEs?: The average CVSS base score across ISC's scored CVEs is 6.8.

References

Vulnerability data is sourced from the CVE Program; severity, KEV, and exploit signals are aggregated by RadicalNotion.AI.

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