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CVE-2023-6269: An argument injection vulnerability has been identified in the administrative web interface of the Atos Unify

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CRITICAL 10.0REMOTEUPGRADEUPGRADEUPGRADE

CVE-2023-6269 is a critical-severity flaw (CVSS 10.0) affecting unify openscape bcf, unify openscape branch, unify openscape session border controller. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An argument injection vulnerability has been identified in the administrative web interface of the Atos Unify OpenScape products "Session Border Controller" (SBC) and "Branch", before version V10 R3.4.0, and OpenScape "BCF" before versions V10R10.12.00 and V10R11.05.02. This allows an unauthenticated attacker to gain root access to the appliance via SSH (scope change) and also bypass authentication for the administrative interface and gain acc

Why this priority

  • Critical severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score10.0 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.9% (top 21%)
CISA exploited listNo
WeaknessCWE-88
Published2023-12-05
Last modified2026-06-17
Publisher (CNA): SEC Consult Vulnerability Lab · Vendor: atos

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

Am I affected?

Timeline

atos unify openscape bcf UPGRADE
Affected: >= 10 and < 10r10.12.00
Fixed in: 10r10.12.00
Safe to downgrade to: a release before 10
1. Check installed version
apt-cache policy unify-openscape-bcf || rpm -q unify-openscape-bcf || unify-openscape-bcf --version
2. UPGRADE to 10r10.12.00 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade unify-openscape-bcf
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade unify-openscape-bcf
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 10 (Debian / Ubuntu)
apt-cache madison unify-openscape-bcf sudo apt install unify-openscape-bcf=<VERSION_BEFORE_10> sudo apt-mark hold unify-openscape-bcf
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list unify-openscape-bcf sudo dnf downgrade unify-openscape-bcf-<VERSION_BEFORE_10> sudo dnf versionlock add unify-openscape-bcf
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.
atos unify openscape branch UPGRADE
Affected: >= 10 and < 10r3.4.0
Fixed in: 10r3.4.0
Safe to downgrade to: a release before 10
1. Check installed version
apt-cache policy unify-openscape-branch || rpm -q unify-openscape-branch || unify-openscape-branch --version
2. UPGRADE to 10r3.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade unify-openscape-branch
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade unify-openscape-branch
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 10 (Debian / Ubuntu)
apt-cache madison unify-openscape-branch sudo apt install unify-openscape-branch=<VERSION_BEFORE_10> sudo apt-mark hold unify-openscape-branch
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list unify-openscape-branch sudo dnf downgrade unify-openscape-branch-<VERSION_BEFORE_10> sudo dnf versionlock add unify-openscape-branch
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.
atos unify openscape session border controller UPGRADE
Affected: >= 10 and < 10r3.4.0
Fixed in: 10r3.4.0
Safe to downgrade to: a release before 10
1. Check installed version
apt-cache policy unify-openscape-session-border-controller || rpm -q unify-openscape-session-border-controller || unify-openscape-session-border-controller --version
2. UPGRADE to 10r3.4.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade unify-openscape-session-border-controller
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade unify-openscape-session-border-controller
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 10 (Debian / Ubuntu)
apt-cache madison unify-openscape-session-border-controller sudo apt install unify-openscape-session-border-controller=<VERSION_BEFORE_10> sudo apt-mark hold unify-openscape-session-border-controller
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list unify-openscape-session-border-controller sudo dnf downgrade unify-openscape-session-border-controller-<VERSION_BEFORE_10> sudo dnf versionlock add unify-openscape-session-border-controller
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-2023-6269?

unify openscape bcf: upgrade to 10r10.12.00; unify openscape branch: upgrade to 10r3.4.0; unify openscape session border controller: upgrade to 10r3.4.0. Exact commands for each OS are on this page.

Is CVE-2023-6269 being exploited?

CVE-2023-6269 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-2023-6269 affect?

CVE-2023-6269 affects unify openscape bcf, unify openscape branch, unify openscape session border controller. Severity is critical (CVSS 10.0). An argument injection vulnerability has been identified in the administrative web interface of the Atos Unify OpenScape products "Session Border Controller" (SBC) and "Branch", before version V10 R3.4.0, and OpenScape "BCF" before versions

How urgent is CVE-2023-6269?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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