RCE in NetApp Snapmanager

CVE-2021-39144

XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.

Vulnerability class: RCE (Remote Code Execution)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.981 (99.9th percentile), scored .

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-39144: held from 0.981 to 0.981.

EPSS over last 30 days · oldest: 0.981 · newest: 0.981 · change: 0.000

Affected products

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: .

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-39144?
CVE-2021-39144 is a high-severity vulnerability in NetApp Snapmanager, classified under Code Injection. CVSS score: 8.5/10. Published 2021-08-23.
How severe is CVE-2021-39144?
High severity. CVSS v3 base score is 8.5 out of 10.
Is CVE-2021-39144 known to be exploited?
Yes. CVE-2021-39144 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-03-10), indicating it is being actively exploited. 15 public proof-of-concept repositories are indexed.