Is CVE-2019-10149 exploited in the wild?

Yes. CVE-2019-10149 is known to be exploited in the wild, first recorded on 10 January 2022. Treat it as urgent.

How severe is CVE-2019-10149?

Critical severity, with a CVSS score of 9.8, published 10 January 2022.

Which products and versions are affected?

Exim Exim 4.87 to 4.91 (inclusive).

Is there a fix for CVE-2019-10149?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2019-10149 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2019-10149?

Check whether you run Exim Mail Transfer Agent (MTA). Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2019-10149: Exim Mail Transfer Agent (MTA) Improper Input Validation

CVE-2019-10149 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-01-10

A flaw in the Exim Mail Transfer Agent (MTA) involves improper validation of recipient addresses in the deliver_message() function within /src/deliver.c. This vulnerability can allow a remote attacker to execute arbitrary commands on the host.

Vendors: Exim.

Quick answers

Is CVE-2019-10149 exploited in the wild?: Yes. CVE-2019-10149 is known to be exploited in the wild, first recorded on 10 January 2022. Treat it as urgent.
How severe is CVE-2019-10149?: Critical severity, with a CVSS score of 9.8, published 10 January 2022.
Which products and versions are affected?: Exim Exim 4.87 to 4.91 (inclusive).
Is there a fix for CVE-2019-10149?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2019-10149 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2019-10149?: Check whether you run Exim Mail Transfer Agent (MTA). Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

Exim Exim 4.87 to 4.91 (inclusive)

Timeline

2019-06-05: disclosed: Initial public disclosure via mailing lists.
2022-01-10: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.

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