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HIGH

CVE-2026-77692

CVSS v3

7.5

HIGH

EPSS Score

6.6 %

exploit probability, as of 2026-10-05

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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.

Technical details

Published
2026-09-16
Last Modified
2026-09-16

Frequently asked questions

What is 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. 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.

Is CVE-2026-77692 actively exploited?

Active exploitation of CVE-2026-77692 has not been confirmed. Its EPSS score was 6.6% on 2026-10-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-77692?

CVE-2026-77692 has a CVSS v3 base score of 7.5 (HIGH severity).

Is CVE-2026-77692 affecting your environment?

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