CVE-2025-67896 [High] | Memory Corruption in Exim

CVE-2025-67896 is rated Low Risk (34.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.06%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2025-12-20	0.04%	0.06%	+0.02%
2	2025-12-14	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2025-12-20

0.04%

0.06%

+0.02%

2025-12-14

—

0.04%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.0	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:L) Might cause slowdowns, glitches, or partial disruption—not a full brick.	2.2	4.7	[email protected]
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.0

3.1

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:L): Might cause slowdowns, glitches, or partial disruption—not a full brick.

2.2

4.7

[email protected]

9.8

3.1

CRITICAL

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

5.9

[email protected]

OS Trackers for CVE-2025-67896

vendor	priority	summary	link
`alpine`	high	CVE-2025-67896: 1 source package rows (exim); 43 state rows across 3 repos (3.22-community, 3.23-community, edge-community); fixed 0, open 43.	https://security.alpinelinux.org/vuln/CVE-2025-67896
`debian`	unimportant	CVE-2025-67896 unimportant priority: Debian including 1 source packages (exim4), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2025-67896
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-67896
`ubuntu`	high	CVE-2025-67896 high priority: Ubuntu including 1 source packages (exim4), 9 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): not-affected 8, needs-triage 1.	https://ubuntu.com/security/CVE-2025-67896

Affected software / configurations for CVE-2025-67896

Vendor	Product	Version	Raw CPE
exim	exim	< 4.99.1	cpe:2.3:a:exim:exim::::::::

References for CVE-2025-67896

URL	Tags
https://exim.org/static/doc/security/	Vendor Advisory
https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt	Vendor Advisory
https://www.openwall.com/lists/oss-security/2025/12/11/2	Mailing List
http://www.openwall.com/lists/oss-security/2025/12/14/1	Mailing List
http://www.openwall.com/lists/oss-security/2025/12/18/3	Mailing List

URL

CVE-2025-67896

Exploit prediction scoring system (EPSS) score for CVE-2025-67896

Common vulnerability scoring system (CVSS) metrics for CVE-2025-67896

Weakness enumeration for CVE-2025-67896

OS Trackers for CVE-2025-67896

Affected software / configurations for CVE-2025-67896

References for CVE-2025-67896