CVE-2026-66809
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVSS
5.5
Medio
EPSS
0.3%
p20
KEV
—
Exploit Today
6
0-100
Publicado: 11 ago 2026 · Última mod.: 14 ago 2026 · CWE-125
0.3%EPSS · 30 días0.4%
2026-08-122026-09-04
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
CVECVSSEPSSKEVRExplotTítuloVis.
CVE-2025-156475.5 MED—
——0CDT before 1.4.5 contains an out-of-bounds read vulnerability in the opposedVertexInd() function when constraint edge intersections are computed in floating point and round outside adjacent triangles. Attackers can supply nearly-degenerate constraint edges through geometry data to trigger an out-of-bounds array access that crashes the calling process.8hCVE-2025-156143.3 BAJ—
——0ugrep before 7.6.0 contains a heap buffer over-read vulnerability in the LZW decompressor when processing crafted .Z archive files. Attackers can supply malformed .Z files that cause the decompressor to read one byte past the allocated heap buffer, potentially crashing the process.8hCVE-2026-861372.9 BAJ—
——0In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.15hCVE-2026-857696.5 MED—
——0A flaw was found in libtpms, a library that provides software TPM 2.0 emulation. When restoring TPM 2.0 state (for example during a virtual machine's power-on or state/migration restore), a malformed state blob can supply an oversized skip-block length that is not validated against the remaining size of the input buffer. This can drive an internal size counter negative, which bypasses a subsequent bounds check due to an unsafe signed-to-unsigned conversion, causing the parser to read memory outside the bounds of the heap buffer holding the state data. Successful exploitation can crash the process hosting libtpms (such as swtpm), resulting in a denial of service of the emulated TPM device and the virtual machine that depends on it. No data corruption or information disclosure was confirmed.1dCVE-2026-166605.3 MED—
——0IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to cause a denial of service due to an out-of-bounds read.1dCVE-2026-856985.5 MED—
——0Turso through 0.8.0-pre.8 contains an out-of-bounds read vulnerability in the table-leaf page reader that uses an attacker-controlled cell-count field without bounds validation. Attackers can craft a malicious database file with a modified cell count value to trigger an index-out-of-bounds panic when querying, causing denial of service in any application that opens untrusted database files.1d