VulnerabilityAwaiting Analysis

CVE-2026-77692

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.

HIGH 7.5EPSS 6.56%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (6.56%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 6.56% probability · 94th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-476
Source: security-officer@isc.org

EPSS trend

EPSS moved from 6.6% on 5 October 2026 to 6.6% on 22 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.