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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-11721

ISC BIND Vulnerability in NetApp Products

CVE-2026-11721: ISC BIND Vulnerability in NetApp Products. Not in the CISA KEV catalog. High advisory severity (CVSS 7.5, NetApp).

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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CVE-2026-11721 key facts

CISA KEV
Not listed (catalog checked )
Highest advisory severity
High
CVSS base score
7.5 (NetApp), 7.5 (Red Hat)
CVSS vector
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N (Red Hat)
Weakness
CWE-345
Fixed releases
  • Red Hat: bind-32:9.18.33-15.el10_2.10, bind-32:9.11.4-26.P2.el7_9.21, bind9.16-32:9.16.23-0.22.el8_10.12, bind-32:9.11.36-16.el8_10.14, bind9.16-32:9.16.23-0.7.el8_6.11, bind9.16-32:9.16.23-0.14.el8_8.9 and 20 more in the advisory
Vendor advisories
2 from NetApp, Red Hat
VulniPulse record
Published · Updated

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-11721; bulletin-wide values are not repeated here.

Is CVE-2026-11721 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-11721 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-11721?

Upgrade to a fixed release named by the vendor:

  • Red Hat: bind-32:9.18.33-15.el10_2.10, bind-32:9.11.4-26.P2.el7_9.21, bind9.16-32:9.16.23-0.22.el8_10.12, bind-32:9.11.36-16.el8_10.14, bind9.16-32:9.16.23-0.7.el8_6.11, bind9.16-32:9.16.23-0.14.el8_8.9

Vendor advisory comparison

NetApp

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-11721] ISC BIND Vulnerability in NetApp Products

    NTAP-20260730-0004Source published Source updated

    ISC BIND versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, and 9.21.0 through 9.21.23 are susceptible to a vulnerability which when successfully exploited could lead to addition or modification of data. Successful exploitation of this vulnerability could lead to addition or modification of data. NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.

    Affected products in this advisory
    No product details extracted. Check the source bulletin.
    Source-reported affected versions
    • 9.11.0
    • 9.18.50
    • 9.20.0
    • 9.20.24

    2 more entries in the full advisory.

    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityHigh7.5

    High [CVE-2026-11721] Cache poisoning via label count discrepancy, RRSIG, wildcards

    CVE-2026-11721Source published Source updated

    It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes `named` to produce a wildcard name for a zone that is shorter than the attacker's zone, which can result in cache poisoning. For this attack to have any effect, the resolver under attack must have set `synth-from-dnssec yes;` (which is the default). This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). Weakness: CWE-345. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7 Extended Lifecycle…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 7 Extended Lifecycle Support
    • Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
    • Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

    9 more entries in the full advisory.

    Source-reported affected versions
    • 9.11.0
    • 9.18.50
    • 9.20.0
    • 9.20.24

    4 more entries in the full advisory.

    Source-reported fixed versions
    • bind-32:9.18.33-15.el10_2.10
    • bind-32:9.11.4-26.P2.el7_9.21
    • bind9.16-32:9.16.23-0.22.el8_10.12
    • bind-32:9.11.36-16.el8_10.14

    22 more entries in the full advisory.

    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

More NetApp advisories

All NetApp advisories

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