PatchTheCVECVE-2026-70571: Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over
CVE-2026-70571 is a high-severity flaw (CVSS 8.1) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.4% (top 28%) |
| CISA exploited list | No |
| Weakness | CWE-121 |
| Published | 2026-10-13 |
| Last modified | 2026-10-14 |
Last updated 2026-10-14 · 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-2026-70571?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-70571 being exploited?
CVE-2026-70571 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-2026-70571 affect?
CVE-2026-70571 affects affected software. Severity is high (CVSS 8.1). Stack-based buffer overflow in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.
How urgent is CVE-2026-70571?
Priority 56/100. High severity; Remotely exploitable, no login, no user action; On your watchlist
Software pages
Microsoft Exchange vulnerabilities