What is CVE-2023-43896?

CVE-2023-43896 is a high-severity vulnerability in Macrium Reflect, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-10-10.

How severe is CVE-2023-43896?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Macrium Reflect

CVE-2023-43896

A buffer overflow in Macrium Reflect 8.1.7544 and below allows attackers to escalate privileges or execute arbitrary code.

Vulnerability class: Buffer Overflow

Published 2023-10-10 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (26.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Macrium Reflect — versions 8.1.7544

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
northwave-cybersecurity.com/vulnerability-notice/macrium-reflect-driver-out-of-… (Exploit, Third Party Advisory)
knowledgebase.macrium.com/display/KNOW80/CVE-2023-43896+Advisory

Frequently asked questions

What is CVE-2023-43896?: CVE-2023-43896 is a high-severity vulnerability in Macrium Reflect, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.8/10. Published 2023-10-10.
How severe is CVE-2023-43896?: High severity. CVSS v3 base score is 7.8 out of 10.