Widely-used Windows RDP client; high-severity RCE via network; impacts enterprise networks globally.
CVE-2026-42985
RDP client heap overflow enables remote code execution.
Is CVE-2026-42985 being exploited?
Not confirmed. CVE-2026-42985 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.3% probability of exploitation in the next 30 days.
How severe is CVE-2026-42985?
CVE-2026-42985 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-42985?
Yes. A fix has been recorded for CVE-2026-42985. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42985 affect?
CVE-2026-42985 affects Windows Remote Desktop Client (mstsc), Windows OS with RDP client enabled. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42985?
Patch ASAP when available; restrict RDP exposure (firewall/VPN only).
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can execute arbitrary code on the target over the network via crafted RDP data.
Patch when possible
- affected>= 1.2.0.0 and < 1.2.7214.0
- affected>= 10.0.14393.0 and < 10.0.14393.9234
- affected>= 10.0.17763.0 and < 10.0.17763.8880
- affected>= 10.0.19044.0 and < 10.0.19044.7417
- affected>= 10.0.19045.0 and < 10.0.19045.7417
- affected>= 10.0.22631.0 and < 10.0.22631.7219
- affected>= 10.0.22631.0 and < 10.0.22631.7219
- affected>= 10.0.26100.0 and < 10.0.26100.8655
- affected>= 10.0.26200.0 and < 10.0.26200.8655
- affected>= 10.0.28000.0 and < 10.0.28000.2269
- affected>= 1.00 and < 2.0.1193.0
- affected>= 6.2.9200.0 and < 6.2.9200.26132
- affected>= 6.3.9600.0 and < 6.3.9600.23228
- affected>= 6.3.9600.0 and < 6.3.9600.23228
- affected>= 6.2.9200.0 and < 6.2.9200.26132
- affected>= 10.0.14393.0 and < 10.0.14393.9234
- affected>= 10.0.14393.0 and < 10.0.14393.9234
- affected>= 10.0.17763.0 and < 10.0.17763.8880
- affected>= 10.0.17763.0 and < 10.0.17763.8880
- affected>= 10.0.20348.0 and < 10.0.20348.5256
- affected>= 10.0.26100.0 and < 10.0.26100.32995
- affected>= 10.0.26100.0 and < 10.0.26100.32995
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.