CVE-2026-26142
CRITICAL 9.8Deserialization of untrusted data in Nuance PowerScribe allows an unauthorized attacker to execute code over a network.
ELEVATED IMPACT
Severe if exploited (CVSS 9.8), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
1.9%chance of exploitation in 30 days · 77th percentile
○ In CISA KEV
○ Public exploit / PoC
Impact if exploited
9.8CVSS 3.1 · CRITICAL
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Affected
Vendors Microsoft
Products Nuance Powerscribe 360 4.0 Nuance Powerscribe 360 Version 4.0.1 Nuance Powerscribe 360 Version 4.0.2 Nuance Powerscribe 360 Version 4.0.3 Nuance Powerscribe 360 Version 4.0.4 Nuance Powerscribe 360 Version 4.0.5 Nuance Powerscribe 360 Version 4.0.6 Nuance Powerscribe 360 Version 4.0.7
Weakness (CWE)
- CWE-502: Deserialization of untrusted data
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C