CVE-2026-120788
A NVD · · CVE-2026-120788
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 contains no indication of active exploitation, a proof of concept, or KEV listing and therefore does not go beyond the basic vulnerability information.
Description
CVE-2026-120788 describes a heap-based buffer overflow in Microsoft Office Excel. An unauthorized attacker can thereby execute code over the network. There is no information on active exploitation, a proof of concept, or CISA KEV inclusion. Microsoft Excel is affected; further details on attack prerequisites or patch status are not available from the NVD entry.
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 | Exploits a heap-based buffer overflow in Microsoft Office Excel to execute arbitrary code when a user opens a maliciously crafted Excel file, potentially delivered over a network. | high | llm |