What is CVE-2021-42550?

CVE-2021-42550 is a medium-severity vulnerability in NetApp Cloud Manager, classified under Deserialization of Untrusted Data. CVSS score: 6.6/10. Published 2021-12-16.

How severe is CVE-2021-42550?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Is CVE-2021-42550 known to be exploited?

28 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in NetApp Cloud Manager

CVE-2021-42550

In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files could craft a malicious configuration allowing to execute arbitrary code loaded from LDAP servers.

Vulnerability class: Insecure Deserialization

Published 2021-12-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.048 (91.9th percentile), scored 2026-10-24.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.044 · newest: 0.048 · change: +0.003

Affected products

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

logback.qos.ch/news.html (Vendor Advisory)
github.com/cn-panda/logbackRceDemo (Exploit, Third Party Advisory)
jira.qos.ch/browse/LOGBACK-1591 (Exploit, Patch, Third Party Advisory, Issue Tracking)
security.netapp.com/advisory/ntap-20211229-0001/ (Third Party Advisory)
seclists.org/fulldisclosure/2022/Jul/11 (mailing-list, Mailing List, Third Party Advisory)
packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-S… (Exploit, VDB Entry, Third Party Advisory)
cert-portal.siemens.com/productcert/pdf/ssa-371761.pdf (Third Party Advisory)

Frequently asked questions

What is CVE-2021-42550?: CVE-2021-42550 is a medium-severity vulnerability in NetApp Cloud Manager, classified under Deserialization of Untrusted Data. CVSS score: 6.6/10. Published 2021-12-16.
How severe is CVE-2021-42550?: Medium severity. CVSS v3 base score is 6.6 out of 10.
Is CVE-2021-42550 known to be exploited?: 28 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.