CVE-2026-77692CWE-476

CVE-2026-77692

High · published September 16, 2026

CVSS v3.1
7.5
EPSS
7%
Percentile
93.8
In the wild
Unconfirmed
What it is

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.

This issue affects BIND 9 versions 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, and 9.20.9-S1 through 9.20.27-S1.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.06558 · 93.8th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-09-16T18:17Z
References (3)
https://downloads.isc.org/isc/bind9/9.20.29 · [email protected]https://downloads.isc.org/isc/bind9/9.21.26 · [email protected]https://kb.isc.org/docs/cve-2026-77692 · [email protected]
EPSS history
Timeline
  • 18 SEP 04:01Z
    EPSS moved — → 0%
    epss
  • 16 SEP 13:55Z
    Unauthenticated remote crash of named via a single DoH SIG(0) request
    cvelistv5