CVE-2026-66141Patch(exim / exim)

LOWCVSS 7.8 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch exim exim systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandled.

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0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://openwall.com/lists/oss-security/2026/07/22/9

Weakness type (CWE)

CWE-829

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

exim

Threat summary

Patch or workaround signal is available
1 mentions across 1 observed day

What's happening

Patch or workaround mentioned in 1 signal
1 total mentions across 1 day

Affected systems

Vendors

exim

Products

exim

Deep dive

Activity timeline1 mentions / 1d

Signal classification1 categories

Patch

1100.0%

Referenced assets1 URL

By indicator

https://x.com/Daily_CyberSec/status/2079977441808822748

Full discourse1 post

Daily CyberSecurity@Daily_CyberSec91d
Patch
The two flaws now carry official CVE identifiers (CVE-2026-66140 & CVE-2026-66141). Both are fixed in Exim 4.99.5. https://x.com/Daily_CyberSec/status/2079977441808822748
Post summary
The tweet announces that two new CVE-identified flaws in Exim have been resolved in version 4.99.5.
00070731
12.9K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	exim	exim	-	-	-

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