PatchTheCVECVE-2026-83770: Heap-based buffer overflow in Windows Text Shaping allows an unauthorized attacker to execute code over a netw
CVE-2026-83770 is a critical-severity flaw (CVSS 9.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Heap-based buffer overflow in Windows Text Shaping allows an unauthorized attacker to execute code over a network.
Why this priority
- Critical severity
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.1% (top 34%) |
| CISA exploited list | No |
| Weakness | CWE-122 |
| Published | 2026-10-13 |
| Last modified | 2026-10-16 |
Last updated 2026-10-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-83770?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-83770 being exploited?
CVE-2026-83770 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-83770 affect?
CVE-2026-83770 affects affected software. Severity is critical (CVSS 9.8). Heap-based buffer overflow in Windows Text Shaping allows an unauthorized attacker to execute code over a network.
How urgent is CVE-2026-83770?
Priority 64/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist