CVE-2021-45761: ROPium v3.1 was discovered to contain an invalid memory address dereference via the find() function.

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2021-45761 is a high-severity flaw (CVSS 7.5) affecting ropium. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ROPium v3.1 was discovered to contain an invalid memory address dereference via the find() function.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-476
Published	2022-01-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ropium project

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

Am I affected?

Timeline

2022-01-14 19:15 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

ropium project ropium DOWNGRADE

Affected: 3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1

1. Check installed version

apt-cache policy ropium || rpm -q ropium || ropium --version

2. No fixed release: DOWNGRADE to a release before 3.1 (Debian / Ubuntu)

apt-cache madison ropium sudo apt install ropium=<VERSION_BEFORE_3.1> sudo apt-mark hold ropium

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ropium sudo dnf downgrade ropium-<VERSION_BEFORE_3.1> sudo dnf versionlock add ropium

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-45761?

ropium: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-45761 being exploited?

CVE-2021-45761 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-2021-45761 affect?

CVE-2021-45761 affects ropium. Severity is high (CVSS 7.5). ROPium v3.1 was discovered to contain an invalid memory address dereference via the find() function.

How urgent is CVE-2021-45761?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

← Back to latest CVEs