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Vulnerability details: VCID-hy1a-tah2-27gq
Vulnerability ID VCID-hy1a-tah2-27gq
Aliases CVE-2026-40686
Summary
Status Published
Exploitability 0.5
Weighted Severity 3.3
Risk 1.6
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-125 Out-of-bounds Read
System Score Found at
epss 0.00031 https://api.first.org/data/v1/epss?cve=CVE-2026-40686
cvssv3.1 3.7 https://code.exim.org/exim/exim/commit/f2570bde16fb4d4a1242ff363a4c4eecf6372efc
ssvc Track https://code.exim.org/exim/exim/commit/f2570bde16fb4d4a1242ff363a4c4eecf6372efc
cvssv3.1 3.7 https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40686.assessment
ssvc Track https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40686.assessment
cvssv3.1 3.7 https://exim.org/static/doc/security/CVE-2026-40686.txt
ssvc Track https://exim.org/static/doc/security/CVE-2026-40686.txt
cvssv3.1 3.7 https://www.openwall.com/lists/oss-security/2026/04/30/21
ssvc Track https://www.openwall.com/lists/oss-security/2026/04/30/21
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-40686
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-40686
21 https://www.openwall.com/lists/oss-security/2026/04/30/21
CVE2026-40686.assessment https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40686.assessment
CVE-2026-40686.txt https://exim.org/static/doc/security/CVE-2026-40686.txt
f2570bde16fb4d4a1242ff363a4c4eecf6372efc https://code.exim.org/exim/exim/commit/f2570bde16fb4d4a1242ff363a4c4eecf6372efc
USN-8228-1 https://usn.ubuntu.com/8228-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://code.exim.org/exim/exim/commit/f2570bde16fb4d4a1242ff363a4c4eecf6372efc
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-01T14:27:01Z/ Found at https://code.exim.org/exim/exim/commit/f2570bde16fb4d4a1242ff363a4c4eecf6372efc
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40686.assessment
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-01T14:27:01Z/ Found at https://exim.org/static/doc/security/cve-2026-04.1/CVE2026-40686.assessment
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://exim.org/static/doc/security/CVE-2026-40686.txt
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-01T14:27:01Z/ Found at https://exim.org/static/doc/security/CVE-2026-40686.txt
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://www.openwall.com/lists/oss-security/2026/04/30/21
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-01T14:27:01Z/ Found at https://www.openwall.com/lists/oss-security/2026/04/30/21
Exploit Prediction Scoring System (EPSS)
Percentile 0.0866
EPSS Score 0.00031
Published At May 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-30T16:22:32.629987+00:00 Debian Importer Import https://security-tracker.debian.org/tracker/data/json 38.5.0