CVE-2026-111677: Antiword through 0.37 contains a heap out-of-bounds read vulnerability in vGet8LstInfo in prop8.c caused by an

Q: How do I fix CVE-2026-111677?

antiword: upgrade to newer than 0.37. Exact commands for each OS are on this page.

Q: Is CVE-2026-111677 being exploited?

CVE-2026-111677 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-111677 affect?

CVE-2026-111677 affects antiword. Severity is medium (CVSS 5.5). Antiword through 0.37 contains a heap out-of-bounds read vulnerability in vGet8LstInfo in prop8.c caused by an inverted bounds check on the PlcfLst record count. Attackers can supply a crafted Word 8 .doc file claiming up to 0xffff LSTF rec

Q: How urgent is CVE-2026-111677?

Priority 26/100. Public exploit reference

Routine

MEDIUM 5.5UPGRADE

CVE-2026-111677 is a medium-severity flaw (CVSS 5.5) affecting antiword. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Antiword through 0.37 contains a heap out-of-bounds read vulnerability in vGet8LstInfo in prop8.c caused by an inverted bounds check on the PlcfLst record count. Attackers can supply a crafted Word 8 .doc file claiming up to 0xffff LSTF records in a tiny buffer, causing reads past the heap allocation that crash the process.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-10-16
Last modified	2026-10-20

Publisher (CNA): VulnCheck · Vendor: antiword project

Last updated 2026-10-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-16 18:17 UTCPublished CVE record published
2026-10-20 19:08 UTCUpdated Record last modified

antiword project antiword UPGRADE

Affected: <= 0.37

Fixed in: newer than 0.37

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.37 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade antiword

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade antiword

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-111677?

antiword: upgrade to newer than 0.37. Exact commands for each OS are on this page.

Is CVE-2026-111677 being exploited?

CVE-2026-111677 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-2026-111677 affect?

CVE-2026-111677 affects antiword. Severity is medium (CVSS 5.5). Antiword through 0.37 contains a heap out-of-bounds read vulnerability in vGet8LstInfo in prop8.c caused by an inverted bounds check on the PlcfLst record count. Attackers can supply a crafted Word 8 .doc file claiming up to 0xffff LSTF rec

How urgent is CVE-2026-111677?

Priority 26/100. Public exploit reference

Related CVEs

CVE-2026-111678 LOW 3.3 UPGRADE Antiword through 0.37 contains a stack out-of-bounds read vulnerability in vGet8PapInfo and vGet8ChrInfo in pr

References

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