01 Record
CVE-2026-40949
Buffer overflow in Windows clients prior to 14.50
MediumPUBLISHEDCNA: Absolute
CNA base score6.8 CVSS v4.0CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
02 Description
Buffer overflow in Windows clients prior to 14.50
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.10% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 0.9% of scored records. A rank, not a probability.
- NVD base score
- 6.8 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-10-26.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-04-30 20:16Z6 MO AGO
- Last updated
- 2026-05-01 14:32Z6 MO AGO
- Reserved
- 2026-04-16
- Assigning CNA
- Absolute
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.8)
- CNA CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
- Weaknesses
- CWE-121Stack-based Buffer OverflowVariant
- Data version
- 5.2
- Document digest
- 3ef83d5a144d496321eb2d751b0bcf71b574295ba791f4eece57d29523f1cfc5
05 Affected products
VendorProductVersionsPlatforms