CVE-2026-118730
A NVD · · CVE-2026-118730
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 CVE identity and a brief RCE description for Excel, without details on exploitation, patch status, or an attack campaign.
Description
CVE-2026-118730 describes a use-after-free vulnerability in Microsoft Office Excel. An unauthenticated attacker could potentially execute code over the network through it. The NVD entry contains no information on affected versions, exploitation status, or a public proof of concept. Whether the vulnerability is already actively exploited or has been added to CISA KEV is not evident from the report.
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 | The attacker exploits a use-after-free vulnerability in Microsoft Office Excel to execute arbitrary code on the victim's system, likely by enticing the user to open a specially crafted Excel file delivered over a network. | high | llm |