CVE-2021-29012: DMA Softlab Radius Manager 4.4.0 assigns the same session cookie to every admin session

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-29012 is a critical-severity flaw (CVSS 9.8) affecting dma radius manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

DMA Softlab Radius Manager 4.4.0 assigns the same session cookie to every admin session. The cookie is valid when the admin is logged in, but is invalid (temporarily) during times when the admin is logged out. In other words, the cookie is functionally equivalent to a static password, and thus provides permanent access if stolen.

Why this priority

Critical 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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.2% (top 12%)
CISA exploited list	No
Weakness	CWE-287
Published	2021-04-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dmasoftlab

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

Am I affected?

Timeline

2021-04-02 13:15 UTCPublished CVE record published
2026-06-17 03:47 UTCUpdated Record last modified

dmasoftlab dma radius manager DOWNGRADE

Affected: 4.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.4.0

1. Check installed version

apt-cache policy dma-radius-manager || rpm -q dma-radius-manager || dma-radius-manager --version

2. No fixed release: DOWNGRADE to a release before 4.4.0 (Debian / Ubuntu)

apt-cache madison dma-radius-manager sudo apt install dma-radius-manager=<VERSION_BEFORE_4.4.0> sudo apt-mark hold dma-radius-manager

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

dnf --showduplicates list dma-radius-manager sudo dnf downgrade dma-radius-manager-<VERSION_BEFORE_4.4.0> sudo dnf versionlock add dma-radius-manager

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-2021-29012?

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

Is CVE-2021-29012 being exploited?

CVE-2021-29012 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-2021-29012 affect?

CVE-2021-29012 affects dma radius manager. Severity is critical (CVSS 9.8). DMA Softlab Radius Manager 4.4.0 assigns the same session cookie to every admin session. The cookie is valid when the admin is logged in, but is invalid (temporarily) during times when the admin is logged out. In other words, the cookie is

How urgent is CVE-2021-29012?

Priority 66/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-29011 MEDIUM 6.1 DOWNGRADE DMA Softlab Radius Manager 4.4.0 is affected by Cross Site Scripting (XSS) via the description, name, or addre

References

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