CVE-2020-1472

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2021-11-03. Federal remediation due 2022-05-03. Known ransomware campaign use: reported by CISA.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

99.38% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.9% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Critical. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-08-17 19:13Z6 YR AGO

Last updated

2025-10-21 23:35Z1 YR AGO

Reserved

2019-11-04

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C

Weaknesses

• CWE-287Improper AuthenticationClass

Data version

5.1

Document digest

ae7495d80e1428dec021593bdda34cf09b5afdab80b63f24c1a51fff69bc8323

• portal.msrc.microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1472x_refsource_MISC
• www.kb.cert.orgVU#490028https://www.kb.cert.org/vuls/id/490028third-party-advisoryx_refsource_CERT-VN
• www.openwall.com[oss-security] 20200917 Samba and CVE-2020-1472 ("Zerologon")http://www.openwall.com/lists/oss-security/2020/09/17/2mailing-listx_refsource_MLIST
• usn.ubuntu.comUSN-4510-1https://usn.ubuntu.com/4510-1/vendor-advisoryx_refsource_UBUNTU
• usn.ubuntu.comUSN-4510-2https://usn.ubuntu.com/4510-2/vendor-advisoryx_refsource_UBUNTU
• lists.fedoraproject.orgFEDORA-2020-0be2776ed3https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/H4OTFBL6YDVFH2TBJFJIE4FMHPJEEJK3/vendor-advisoryx_refsource_FEDORA
• lists.opensuse.orgopenSUSE-SU-2020:1513http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00080.htmlvendor-advisoryx_refsource_SUSE
• lists.opensuse.orgopenSUSE-SU-2020:1526http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00086.htmlvendor-advisoryx_refsource_SUSE
• lists.fedoraproject.orgFEDORA-2020-77c15664b0https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TAPQQZZAT4TG3XVRTAFV2Y3S7OAHFBUP/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-a1d139381ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ST6X3A2XXYMGD4INR26DQ4FP4QSM753B/vendor-advisoryx_refsource_FEDORA
• usn.ubuntu.comUSN-4559-1https://usn.ubuntu.com/4559-1/vendor-advisoryx_refsource_UBUNTU
• lists.debian.org[debian-lts-announce] 20201123 [SECURITY] [DLA 2463-1] samba security updatehttps://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlmailing-listx_refsource_MLIST
• security.gentoo.orgGLSA-202012-24https://security.gentoo.org/glsa/202012-24vendor-advisoryx_refsource_GENTOO
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuApr2021.htmlx_refsource_MISC
• packetstormsecurity.comhttp://packetstormsecurity.com/files/159190/Zerologon-Proof-Of-Concept.htmlx_refsource_MISC
• www.synology.comhttps://www.synology.com/security/advisory/Synology_SA_20_21x_refsource_CONFIRM
• packetstormsecurity.comhttp://packetstormsecurity.com/files/160127/Zerologon-Netlogon-Privilege-Escalation.htmlx_refsource_MISC
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1472government-resource