CVE-2026-61223: Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (comp

This month

CRITICAL 9.0REMOTEDOWNGRADE

CVE-2026-61223 is a critical-severity flaw (CVSS 9.0) affecting communications converged application server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (component: Security). Supported versions that are affected are 8.2 and 8.3. Difficult to exploit vulnerability allows unauthenticated attacker with network access via TCP/IP to compromise Oracle Communications Converged Application Server. While the vulnerability is in Oracle Communications Converged Application Server, attacks may signifi

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-07-21
Last modified	2026-10-24

Publisher (CNA): Oracle · Vendor: oracle

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-21 22:18 UTCPublished CVE record published
2026-10-24 15:10 UTCUpdated Record last modified

oracle communications converged application server DOWNGRADE

Affected: 8.2.0 · 8.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.2.0

1. Check installed version

apt-cache policy communications-converged-application-server || rpm -q communications-converged-application-server || communications-converged-application-server --version

2. No fixed release: DOWNGRADE to a release before 8.2.0 (Debian / Ubuntu)

apt-cache madison communications-converged-application-server sudo apt install communications-converged-application-server=<VERSION_BEFORE_8.2.0> sudo apt-mark hold communications-converged-application-server

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

dnf --showduplicates list communications-converged-application-server sudo dnf downgrade communications-converged-application-server-<VERSION_BEFORE_8.2.0> sudo dnf versionlock add communications-converged-application-server

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · sugar-abacus · FIXED · 61-18.fc46 · FEDORA-2026-b1e9de9204 · source

sudo dnf upgrade --advisory=FEDORA-2026-b1e9de9204

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.oracle.com/security-alerts/cpujul2026.html

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-2026-61223?

communications converged application server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-61223 being exploited?

CVE-2026-61223 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-2026-61223 affect?

CVE-2026-61223 affects communications converged application server. Severity is critical (CVSS 9.0). Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (component: Security). Supported versions that are affected are 8.2 and 8.3. Difficult to exploit vulnerability allows unauthenticate

How urgent is CVE-2026-61223?

Priority 45/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-61225 HIGH 8.1 DOWNGRADE Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (comp
CVE-2026-61224 HIGH 8.0 DOWNGRADE Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (comp
CVE-2026-61226 HIGH 7.5 DOWNGRADE Vulnerability in the Oracle Communications Converged Application Server product of Oracle Communications (comp

References

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