CVE-2018-5326: Cheetah Mobile CM Browser 5.22.06.0012, when installed on unspecified "older" Android platforms, allows Same O

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HIGH 7.5REMOTEDOWNGRADE

CVE-2018-5326 is a high-severity flaw (CVSS 7.5) affecting cm browser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cheetah Mobile CM Browser 5.22.06.0012, when installed on unspecified "older" Android platforms, allows Same Origin Policy Bypass.

Why this priority

High severity
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	1.2% (top 32%)
CISA exploited list	No
Published	2018-01-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cmcm

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

Am I affected?

Timeline

2018-01-12 02:29 UTCPublished CVE record published
2026-06-17 02:00 UTCUpdated Record last modified

cmcm cm browser DOWNGRADE

Affected: 5.22.06.0012

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.22.06.0012

1. Check installed version

apt-cache policy cm-browser || rpm -q cm-browser || cm-browser --version

2. No fixed release: DOWNGRADE to a release before 5.22.06.0012 (Debian / Ubuntu)

apt-cache madison cm-browser sudo apt install cm-browser=<VERSION_BEFORE_5.22.06.0012> sudo apt-mark hold cm-browser

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

dnf --showduplicates list cm-browser sudo dnf downgrade cm-browser-<VERSION_BEFORE_5.22.06.0012> sudo dnf versionlock add cm-browser

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-2018-5326?

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

Is CVE-2018-5326 being exploited?

CVE-2018-5326 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-2018-5326 affect?

CVE-2018-5326 affects cm browser. Severity is high (CVSS 7.5). Cheetah Mobile CM Browser 5.22.06.0012, when installed on unspecified "older" Android platforms, allows Same Origin Policy Bypass.

How urgent is CVE-2018-5326?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

Software pages

Android vulnerabilities

References

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