Detections
Analytics

ISC BIND 9.20.0 < 9.20.29 / 9.20.9-S1 < 9.20.29-S1 / 9.21.0 < 9.21.26 DoS (CVE-2026-77692)

high Nessus Plugin ID 347970

Synopsis

The remote name server is affected by a denial of service vulnerability.

Description

The version of ISC BIND running on the remote host is 9.20.0 through 9.20.27 or 9.21.0 through 9.21.25. Supported Preview Edition releases 9.20.9-S1 through 9.20.27-S1 are also affected. It is, therefore, affected by a vulnerability :

 - An attacker can cause named to abort by sending a crafted DNS-over-HTTPS request with a cryptographically invalid SIG(0) record, and then closing the transport connection prematurely. A successful attack may result in abnormal program termination and a denial-of-service. (CVE-2026-77692)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to ISC BIND version 9.20.29 / 9.20.29-S1 / 9.21.26 or later.

See Also

https://kb.isc.org/docs/aa-00913

https://kb.isc.org/docs/cve-2026-77692

Plugin Details

Severity: High

ID: 347970

File Name: bind9_92126_cve-2026-77692.nasl

Version: 1.2

Type: Remote

Family: DNS

Published: 9/18/2026

Updated: 9/18/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.3

CVSS v2

Risk Factor: High

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-77692

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:/a:isc:bind

Required KB Items: Settings/ParanoidReport, bind/version

Patch Publication Date: 9/16/2026

Vulnerability Publication Date: 9/16/2026

Reference Information

CVE: CVE-2026-77692

IAVA: 2026-A-1029