What is CVE-2021-32556?

CVE-2021-32556 is a low-severity vulnerability in Canonical Apport, classified under OS Command Injection. CVSS score: 3.8/10. Published 2021-06-12.

How severe is CVE-2021-32556?

Low severity. CVSS v3 base score is 3.8 out of 10.

RCE in Canonical Apport

CVE-2021-32556

It was discovered that the get_modified_conffiles() function in backends/packaging-apt-dpkg.py allowed injecting modified package names in a manner that would confuse the dpkg(1) call.

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-06-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (24.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Canonical Apport — versions 2.20.1, 2.20.9, 2.20.11-0ubuntu27

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904 (Vendor Advisory)

Frequently asked questions

What is CVE-2021-32556?: CVE-2021-32556 is a low-severity vulnerability in Canonical Apport, classified under OS Command Injection. CVSS score: 3.8/10. Published 2021-06-12.
How severe is CVE-2021-32556?: Low severity. CVSS v3 base score is 3.8 out of 10.