CVE-2018-10921: Certain input files may trigger an integer overflow in ttembed input file processing

Routine

MEDIUM 4.3MITIGATE

CVE-2018-10921 is a medium-severity flaw (CVSS 4.3) affecting ttembed. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Certain input files may trigger an integer overflow in ttembed input file processing. This overflow could potentially lead to corruption of the input file due to a lack of checking return codes of fgetc/fputc function calls.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-20, CWE-190
Published	2018-08-02
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: ttembed project

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

Am I affected?

Timeline

2018-08-02 18:29 UTCPublished CVE record published
2026-06-17 01:34 UTCUpdated Record last modified

ttembed project ttembed MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ttembed || rpm -q ttembed || ttembed --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

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-2018-10921?

ttembed: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-10921 being exploited?

CVE-2018-10921 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-2018-10921 affect?

CVE-2018-10921 affects ttembed. Severity is medium (CVSS 4.3). Certain input files may trigger an integer overflow in ttembed input file processing. This overflow could potentially lead to corruption of the input file due to a lack of checking return codes of fgetc/fputc function calls.

How urgent is CVE-2018-10921?

Priority 36/100. Public exploit reference

Related CVEs

CVE-2018-10922 HIGH 7.5 MITIGATE An input validation flaw exists in ttembed

References

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