CVE-2023-29728: The Call Blocker application 6.6.3 for Android allows attackers to tamper with feature-related data, resulting

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2023-29728 is a critical-severity flaw (CVSS 9.8) affecting call blocker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Call Blocker application 6.6.3 for Android allows attackers to tamper with feature-related data, resulting in a severe elevation of privilege attack.

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	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-346
Published	2023-05-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: applika

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

Am I affected?

Timeline

2023-05-30 23:15 UTCPublished CVE record published
2026-06-17 05:50 UTCUpdated Record last modified

applika call blocker DOWNGRADE

Affected: 6.6.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.6.3

1. Check installed version

apt-cache policy call-blocker || rpm -q call-blocker || call-blocker --version

2. No fixed release: DOWNGRADE to a release before 6.6.3 (Debian / Ubuntu)

apt-cache madison call-blocker sudo apt install call-blocker=<VERSION_BEFORE_6.6.3> sudo apt-mark hold call-blocker

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

dnf --showduplicates list call-blocker sudo dnf downgrade call-blocker-<VERSION_BEFORE_6.6.3> sudo dnf versionlock add call-blocker

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-2023-29728?

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

Is CVE-2023-29728 being exploited?

CVE-2023-29728 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-2023-29728 affect?

CVE-2023-29728 affects call blocker. Severity is critical (CVSS 9.8). The Call Blocker application 6.6.3 for Android allows attackers to tamper with feature-related data, resulting in a severe elevation of privilege attack.

How urgent is CVE-2023-29728?

Priority 56/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities

Related CVEs

CVE-2023-29727 CRITICAL 9.8 DOWNGRADE The Call Blocker application 6.6.3 for Android allows unauthorized applications to use exposed components to d
CVE-2023-29726 HIGH 7.5 DOWNGRADE The Call Blocker application 6.6.3 for Android incorrectly opens a key component that an attacker can use to i

References

← Back to latest CVEs