How many CVEs does ISC have?

ISC has 268 published CVE records since 1999, including 35 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-606 (Unchecked Input for Loop Condition).

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 138 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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268 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.

268

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 268 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 268 published CVEs.

Average CVSS: 6.8
Critical / high: 59%
Actively exploited (KEV): 0%
Public exploit available: 10%
Patch available: 78%

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

High138

Medium104

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

21

Latest ISC CVEs

The most recently disclosed vulnerabilities affecting ISC.

DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field
CWE-346
High · CVSS 8.6
EPSS 0.2%2026-07-22
Unexpected exit in certain situations with NSEC and NSEC3 both present
CWE-617
High · CVSS 7.5
EPSS 0.5%2026-07-22
Record ordering based unexpected exit with CNAME or DNAME
CWE-617
High · CVSS 7.5
EPSS 0.5%2026-07-22
Cache poisoning possible with label count discrepancy, RRSIG, and wildcards
CWE-1284
High · CVSS 7.5
EPSS 0.4%2026-07-22
Potential memory usage beyond configured limits
CWE-770
High · CVSS 7.5
EPSS 0.5%2026-07-22
Unnecessary validation of DNSSEC signed records
CWE-408
High · CVSS 7.5
EPSS 0.5%2026-07-22
Potential wildcard CNAME RPZ policy bypass
CWE-790
High · CVSS 7.5
EPSS 0.4%2026-07-22
Key Record using PRIVATEDNS algorithm may lead to unexpected exit
CWE-617
Medium · CVSS 6.5
EPSS 0.4%2026-07-22
Incorrect acceptance of NSEC3 records
CWE-347
Medium · CVSS 6.8
EPSS 0.3%2026-07-22
Unbounded resend loop in BIND 9 resolver
CWE-606
Medium · CVSS 5.3
EPSS 0.7%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 1.9%2026-05-20

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Frequently asked questions

Common questions about ISC vulnerabilities.

How many CVEs does ISC have?: ISC has 268 published CVE records since 1999, including 35 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-606 (Unchecked Input for Loop Condition).
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 138 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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