CVE-2026-118301
A NVD · · CVE-2026-118301
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
- 7.5
- EPSS
- 0%
Key insight
The alert essentially provides only the CVE description; there is no information on active exploitation, a PoC, or specific attacker TTPs.
Description
CVE-2026-118301 describes a vulnerability in Microsoft Excel based on the use of an uninitialized resource. An unauthenticated attacker can thereby execute code over the network. The NVD has so far published no information on exploitation, PoC, or affected versions. It is not apparent whether the vulnerability is actively exploited.
Risk score
- cvss base
- 75.00
- kev bonus
- 0.00
- epss bonus
- 0.00
- poc bonus
- 0.00
- raw before weight
- 75.00
- 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-2026-118301, a use of uninitialized resource vulnerability in Microsoft Office Excel, to execute arbitrary code on a victim's system when a malicious Excel file is opened, potentially delivered over a network. | high | llm |