CVE-2020-10772

Name: CVE-2020-10772
Creator: NVD / NIST
Published: 2020-11-27T18:15:11.44+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.33%

Last modified Jun 17, 2026

CVE-2020-10772 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An incomplete fix for CVE-2020-12662 was shipped for Unbound in Red Hat Enterprise Linux 7, as part of erratum RHSA-2020:2414. Vulnerable versions of Unbound could still amplify an incoming query into a large number of queries directed to a target, even with a lower amplification ratio compared to versions of Unbound that shipped before the mentioned erratum. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

An incomplete fix for CVE-2020-12662 was shipped for Unbound in Red Hat Enterprise Linux 7, as part of erratum RHSA-2020:2414. Vulnerable versions of Unbound could still amplify an incoming query into a large number of queries directed to a target, even with a lower amplification ratio compared to versions of Unbound that shipped before the mentioned erratum. This issue is about the incomplete fix for CVE-2020-12662, and it does not affect upstream versions of Unbound.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nlnetlabs	Unbound	1.6.6-5

References

https://bugzilla.redhat.com/show_bug.cgi?id=1846026Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1846026Issue Tracking, Third Party Advisory

Timeline

Published: Nov 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10772?

How severe is CVE-2020-10772?

CVE-2020-10772 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10772?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10772?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST