Medium severity · published Oct 16, 2026
CVE-2026-111677
Antiword through 0.37 Heap Out-of-Bounds Read via vGet8LstInfo in prop8.c
5.5
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AN
antiword · Adri van Os
through 0.37 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111677
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111677
Product
https://github.com/rsdoiel/antiword/blob/fe4b579067122a2d9d62647efb1ee7cfe3ca92bb/prop8.c#L799-L825
Exploit
https://hackmd.io/@haindpwn/antiword-word8-plcflst-count-and-fkp-run-oob-read
Third Party Advisory
https://www.vulncheck.com/advisories/antiword-through-0.37-heap-out-of-bounds-read-via-vget8lstinfo-in-prop8-c
More from antiword
3.3
CVE-2026-111678
Antiword through 0.37 Stack Out-of-Bounds Read via prop8.c FKP Parsing