CVE-2020-25863

Name: CVE-2020-25863
Creator: NVD / NIST
Published: 2020-10-06T15:15:15.333+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.86%

Last modified Jun 17, 2026

CVE-2020-25863 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In Wireshark 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the MIME Multipart dissector could crash. This was addressed in epan/dissectors/packet-multipart.c by correcting the deallocation of invalid MIME parts.. EPSS estimates a 4.86% chance of exploitation in the next 30 days.

Description

In Wireshark 3.2.0 to 3.2.6, 3.0.0 to 3.0.13, and 2.6.0 to 2.6.20, the MIME Multipart dissector could crash. This was addressed in epan/dissectors/packet-multipart.c by correcting the deallocation of invalid MIME parts.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

4.86%

90.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Wireshark	Wireshark	>= 2.6.0, <= 2.6.20
Wireshark	Wireshark	>= 3.0.0, <= 3.0.13
Wireshark	Wireshark	>= 3.2.0, <= 3.2.6
Fedoraproject	Fedora	31
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33
Opensuse	Leap	15.1
Opensuse	Leap	15.2
Debian	Debian Linux	9.0
Oracle	Zfs Storage Appliance Firmware	8.8

References

http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.htmlMailing List, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/commit/5803c7b87b3414cdb8bf502af50bb406ca774482Patch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/16741Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00008.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DQHPKZFQ7W3X34RYN3FWFYCFJD4FXJW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGRYKW4XLR44YDWTAH547ODYYBYPB2D/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZUHMK5HYTUUDXA64T2TAMAFMYV674QBW/
https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2020-11.htmlPatch, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00035.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00038.htmlMailing List, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/commit/5803c7b87b3414cdb8bf502af50bb406ca774482Patch, Third Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/16741Exploit, Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00008.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DQHPKZFQ7W3X34RYN3FWFYCFJD4FXJW/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IGRYKW4XLR44YDWTAH547ODYYBYPB2D/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZUHMK5HYTUUDXA64T2TAMAFMYV674QBW/
https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2020-11.htmlPatch, Third Party Advisory

Timeline

Published: Oct 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25863?

How severe is CVE-2020-25863?

CVE-2020-25863 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.86% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25863?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-25863?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST