CVE-2021-34820: Web Path Directory Traversal in the Novus HTTP Server

Q: How do I fix CVE-2021-34820?

novus management system: upgrade to newer than 1.51.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-34820 being exploited?

CVE-2021-34820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-34820 affect?

CVE-2021-34820 affects novus management system. Severity is high (CVSS 7.5). Web Path Directory Traversal in the Novus HTTP Server. The Novus HTTP Server is affected by the Directory Traversal for Arbitrary File Access vulnerability. A remote, unauthenticated attacker using an HTTP GET request may be able to exploit

Q: How urgent is CVE-2021-34820?

Priority 54/100. High severity; EPSS top 9%: very likely to be exploited; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2021-34820 is a high-severity flaw (CVSS 7.5) affecting novus management system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Web Path Directory Traversal in the Novus HTTP Server. The Novus HTTP Server is affected by the Directory Traversal for Arbitrary File Access vulnerability. A remote, unauthenticated attacker using an HTTP GET request may be able to exploit this issue to access sensitive data. The issue was discovered in the NMS (Novus Management System) software through 1.51.2

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.0% (top 9%)
CISA exploited list	No
Weakness	CWE-22
Published	2021-07-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: aat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-07-19 18:15 UTCPublished CVE record published
2026-06-17 03:56 UTCUpdated Record last modified

aat novus management system UPGRADE

Affected: <= 1.51.2

Fixed in: newer than 1.51.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy novus-management-system || rpm -q novus-management-system || novus-management-system --version

2. UPGRADE to newer than 1.51.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade novus-management-system

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade novus-management-system

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-34820?

novus management system: upgrade to newer than 1.51.2. Exact commands for each OS are on this page.

Is CVE-2021-34820 being exploited?

CVE-2021-34820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-34820 affect?

CVE-2021-34820 affects novus management system. Severity is high (CVSS 7.5). Web Path Directory Traversal in the Novus HTTP Server. The Novus HTTP Server is affected by the Directory Traversal for Arbitrary File Access vulnerability. A remote, unauthenticated attacker using an HTTP GET request may be able to exploit

How urgent is CVE-2021-34820?

Priority 54/100. High severity; EPSS top 9%: very likely to be exploited; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-34821 MEDIUM 6.1 UPGRADE Cross Site Scripting (XSS) vulnerability exists in AAT Novus Management System through 1.51.2

References

← Back to latest CVEs