Is CVE-2021-43033 in the CISA KEV catalog?

No. CVE-2021-43033 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-43033?

CVE-2021-43033 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-43033?

CVE-2021-43033 has an EPSS score of 5.99% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-43033?

Upgrade unitrends backup to 10.5.5 or later.

CVE & CISA-KEV Catalog

CVE-2021-43033

CRITICALEPSS 92th pctl

9.8

CVSS v3

NVD

Description

An issue was discovered in Kaseya Unitrends Backup Appliance before 10.5.5. Multiple functions in the bpserverd daemon were vulnerable to arbitrary remote code execution as root. The vulnerability was caused by untrusted input (received by the server) being passed to system calls.

CWE-78OS Command Injection

How to fix

Remediation Available

unitrends backupNVD

Affected:>= 10.0, < 10.5.5Fixed in:10.5.5CVE-2021-43033derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

5.99%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Exploit2

Vendor Advisory1

helpdesk.kaseya.com

Related Vulnerabilities

Other CWE-78 (OS Command Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-1498	Critical	9.8	100%	KEV	Fix
CVE-2014-6271	Critical	9.8	100%	KEV	Fix
CVE-2019-16920	Critical	9.8	100%	KEV	-
CVE-2022-44877	Critical	9.8	100%	KEV	Fix
CVE-2020-8515	Critical	9.8	100%	KEV	-
CVE-2020-9054	Critical	9.8	100%	KEV	Fix

Embed a live status badge for CVE-2021-43033

Markdown

[![CVE-2021-43033](https://tridentstack.com/cve/badge/CVE-2021-43033.svg)](https://tridentstack.com/cve/CVE-2021-43033)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-43033"><img src="https://tridentstack.com/cve/badge/CVE-2021-43033.svg" alt="CVE-2021-43033"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.