CVE-2026-118720
A NVD · · CVE-2026-118720
Admiralty grading (A–F · 1–6)
Source reliability
- A Completely reliable
- B Usually reliable
- C Fairly reliable
- D Not usually reliable
- E Unreliable
- F Cannot be judged
Information credibility
- 1 Confirmed
- 2 Probably true
- 3 Possibly true
- 4 Doubtful
- 5 Improbable
- 6 Cannot be judged
NATO Admiralty (AJP-2.1) grades confidence, independent of the risk score. Cross-source corroboration isn't tracked for non-CVE news, so single-source items are capped at a lower credibility number; a low number does not imply low quality.
Key metrics
- CVSS
- 8.8
- EPSS
- 0%
Key insight
The report only provides the NVD description of the vulnerability; there is no indication of active exploitation, exploit code, or an attack campaign.
Description
CVE-2026-118720 describes a stack-based buffer overflow in Microsoft Office Excel. An unauthenticated attacker may be able to execute code over the network. The report originates from NVD and does not include details on affected versions, exploitation prerequisites, or technical specifics. There is no information on active exploitation, proof-of-concept code, or inclusion in known exploited vulnerability catalogs.
Risk score
- cvss base
- 88.00
- kev bonus
- 0.00
- epss bonus
- 0.00
- poc bonus
- 0.00
- raw before weight
- 88.00
- industry weight
- 1.21
- freshness factor
- 1.00
- exploitability factor
- 1.00
- days old
- 0.00
- vendor mismatch penalty
- 0.00
Path: operational
MITRE ATT&CK mapping
1 TTPProcedure details
| Technique | Tactic | Procedure | Conf. | Source |
|---|---|---|---|---|
| T1203 Exploitation for Client Execution | Execution | An attacker exploits a stack-based buffer overflow in Microsoft Office Excel by crafting a malicious Excel file that, when opened, triggers the vulnerability and allows arbitrary code execution on the victim's system. | high | llm |