CVE-2026-118717
A NVD · · CVE-2026-118717
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
Beyond patch information, the entry provides no indication of active exploitation, affected campaigns, or threat actors.
Description
CVE-2026-118717 affects Microsoft Office Excel and describes a stack-based buffer overflow. An unauthenticated attacker can execute code over the network. The NVD entry provides no details on exploitation, attack vectors, or affected versions. There is no indication of active exploitation or inclusion in CISA KEV.
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 CVE-2026-118717 by delivering a crafted Excel file that triggers a stack-based buffer overflow in Microsoft Office Excel, allowing unauthorized remote code execution on the victim's system. | high | llm |