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CVE-2017-20225: TiEmu 2.08 and prior contains a stack-based buffer overflow vulnerability that allows attackers to execute arb

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This week
CRITICAL 9.8REMOTEUPGRADE

CVE-2017-20225 is a critical-severity flaw (CVSS 9.8) affecting tiemu. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TiEmu 2.08 and prior contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by exploiting inadequate boundary checks on user-supplied input. Attackers can trigger the overflow through command-line arguments passed to the application, leveraging ROP gadgets to bypass protections and execute shellcode in the application context.

Why this priority

  • Critical severity
  • Public exploit reference
  • CISA SSVC: automatable with total technical impact
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.8% (top 43%)
CISA exploited listNo
WeaknessCWE-787
Published2026-03-28
Last modified2026-06-17
Publisher (CNA): VulnCheck · Vendor: ticalc

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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

ticalc tiemu UPGRADE
Affected: <= 2.0.8
Fixed in: newer than 2.0.8
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy tiemu || rpm -q tiemu || tiemu --version
2. UPGRADE to newer than 2.0.8 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade tiemu
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade tiemu
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora ELN · perl-Encode · FIXED · 3.25-528.eln159 · FEDORA-2026-79991d0238 · source
sudo dnf upgrade --advisory=FEDORA-2026-79991d0238
Fedora 46 · fonttools · FIXED · 4.68.0-1.fc46 · FEDORA-2026-65d6c01c75 · source
sudo dnf upgrade --advisory=FEDORA-2026-65d6c01c75
Debian 12 · tiemu · NO FIX YET

Public exploits and detection

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

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-2017-20225?

tiemu: upgrade to newer than 2.0.8. Exact commands for each OS are on this page.

Is CVE-2017-20225 being exploited?

CVE-2017-20225 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-2017-20225 affect?

CVE-2017-20225 affects tiemu. Severity is critical (CVSS 9.8). TiEmu 2.08 and prior contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by exploiting inadequate boundary checks on user-supplied input. Attackers can trigger the overflow through command-li

How urgent is CVE-2017-20225?

Priority 61/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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