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Fencer Vulns
high 7.5

CVE-2020-25863 json

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.

published 2020-10-06 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-18496

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.9%
EPSS 4.9% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

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.

Patch / fix

  • wireshark Debian 14, Debian 13, Debian 12 3.2.7-1

debian advisories DEBIAN-CVE-2020-25863

  • wireshark Ubuntu Pro 14.04 LTS 2.6.10-1~ubuntu14.04.0~esm2
  • wireshark Ubuntu Pro 16.04 LTS 2.6.10-1~ubuntu16.04.0+esm1
  • wireshark Ubuntu Pro 18.04 LTS 2.6.10-1~ubuntu18.04.0+esm1
  • wireshark Ubuntu Pro 20.04 LTS 3.2.3-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-25863

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • wireshark SLE Module for Desktop Applications 15 SP2, SLE Module for Desktop Applications 15 SP1, SLE Module for Basesystem 15 SP2 +1 more 3.2.7-3.41.1

suse advisories SUSE-SU-2020:3166-1

  • wireshark openSUSE Tumbleweed 3.4.8-1.2
  • wireshark openSUSE Leap 15.2 3.2.7-lp152.2.6.1
  • wireshark openSUSE Leap 15.1 3.2.7-lp151.2.15.1

opensuse advisories openSUSE-SU-2024:11513-1openSUSE-SU-2020:1882-1openSUSE-SU-2020:1878-1

  • wireshark Alpine 3.11, Alpine 3.10 3.0.14-r0
  • wireshark Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 3.2.7-r0

alpine advisories ALPINE-CVE-2020-25863

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-25863 updated cvss 7.5

wireshark: MIME multipart dissector crash (wnpa-sec-2020-11)

  • Red Hat Enterprise Linux 8 wireshark, wireshark-cli
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 wireshark Red Hat Enterprise Linux 6 wireshark, wireshark-gnome Red Hat Enterprise Linux 7 wireshark, wireshark-gnome
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.92% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • gitlab.com https://gitlab.com/wireshark/wireshark/-/issues/16741 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.