CVE-2026-118293
A NVD · · CVE-2026-118293
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 the bare CVE summary, the advisory provides no indication of active exploitation, affected versions, or specific attack techniques.
Description
CVE-2026-118293 describes an out-of-bounds read in Microsoft Office Excel that is said to allow an unauthorized attacker to execute code over the network. The NVD entry lists neither affected versions nor a CVSS score or exploitation details. There is no information on active exploitation, proof-of-concept code, or inclusion in the CISA KEV list. The vulnerability affects Microsoft Excel as part of the Office product family; further technical details on the attack chain are missing from the advisory.
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-2026-118293, an out-of-bounds read vulnerability in Microsoft Office Excel, by providing a crafted Excel file to a victim. When the victim opens the file, the vulnerability is triggered, allowing the attacker to execute arbitrary code remotely. | high | llm |