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Vulnerability details: VCID-dnru-ftg8-vkc4
Vulnerability ID VCID-dnru-ftg8-vkc4
Aliases CVE-2023-51765
Summary sendmail: SMTP smuggling vulnerability
Status Published
Exploitability 0.5
Weighted Severity 4.8
Risk 2.4
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-345 Insufficient Verification of Data Authenticity
CWE-451 User Interface (UI) Misrepresentation of Critical Information
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-51765.json
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00466 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
epss 0.00608 https://api.first.org/data/v1/epss?cve=CVE-2023-51765
cvssv3.1 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2023-51765
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-51765.json
https://access.redhat.com/security/cve/CVE-2023-51765
https://api.first.org/data/v1/epss?cve=CVE-2023-51765
https://bugzilla.suse.com/show_bug.cgi?id=1218351
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-51765
https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc
https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html
https://lwn.net/Articles/956533/
https://www.openwall.com/lists/oss-security/2023/12/21/7
https://www.openwall.com/lists/oss-security/2023/12/22/7
https://www.youtube.com/watch?v=V8KPV96g1To
http://www.openwall.com/lists/oss-security/2023/12/24/1
http://www.openwall.com/lists/oss-security/2023/12/25/1
http://www.openwall.com/lists/oss-security/2023/12/26/5
http://www.openwall.com/lists/oss-security/2023/12/29/5
http://www.openwall.com/lists/oss-security/2023/12/30/1
http://www.openwall.com/lists/oss-security/2023/12/30/3
1059386 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1059386
2255869 https://bugzilla.redhat.com/show_bug.cgi?id=2255869
cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
CVE-2023-51765 https://nvd.nist.gov/vuln/detail/CVE-2023-51765
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-51765.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-51765
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.63447
EPSS Score 0.00466
Published At Sept. 9, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T10:00:45.979676+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-51765.json 37.0.0