CVE-2026-3591: isc bind

csirt@kutim:~/threat-intel/cve/CVE-2026-3591

CVSS 5.4 · Medium EPSS 0,32%

Kerentanan Authentication Bypass by Primary Weakness pada isc bind. Skor CVSS 3.1 5.4 (Medium) menurut isc.org.

Deskripsi (NVD)

A use-after-return vulnerability exists in the `named` server when handling DNS queries signed with SIG(0). Using a specially-crafted DNS request, an attacker may be able to cause an ACL to improperly (mis)match an IP address. In a default-allow ACL (denying only specific IP addresses), this may lead to unauthorized access. Default-deny ACLs should fail-secure. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.

Rincian

Terbit di NVD: 25 Maret 2026
Terakhir diubah: 17 Juni 2026
Status NVD: Analyzed
CVSS 3.1: 5.4 (Medium), sumber isc.org
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-305: Authentication Bypass by Primary Weakness
CWE-562: Return of Stack Variable Address
EPSS (30 hari): 0,32% peluang dieksploitasi; lebih tinggi dari 23,6% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
isc	bind	Versi 9.20.0 hingga sebelum 9.20.21
isc	bind	Versi 9.21.0 hingga sebelum 9.21.20

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://kb.isc.org/docs/cve-2026-3591 advisory vendor
https://downloads.isc.org/isc/bind9/9.20.21 patch
https://downloads.isc.org/isc/bind9/9.21.20 patch

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:11 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.