Out-of-bounds Read in Adri Van OS Antiword
CVE-2026-111677
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-read (third-party-advisory)
- github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8… (technical-description)
- www.vulncheck.com/advisories/antiword-through-0.37-heap-out-of-bounds-read-via-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111677?
- CVE-2026-111677 is a medium-severity vulnerability in Adri Van OS Antiword, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-10-16.
- How severe is CVE-2026-111677?
- Medium severity. CVSS v3 base score is 5.5 out of 10.