What is CVE-2023-34853?

CVE-2023-34853 is a high-severity vulnerability in Supermicro H11dsi, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-08-22.

How severe is CVE-2023-34853?

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

Is CVE-2023-34853 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Supermicro H11dsi

CVE-2023-34853

Buffer Overflow vulnerability in Supermicro motherboard X12DPG-QR 1.4b allows local attackers to hijack control flow via manipulation of SmcSecurityEraseSetupVar variable.

Vulnerability class: Buffer Overflow

Published 2023-08-22 · last modified 2026-06-17.

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: 0.004 (30.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

www.supermicro.com/Bios/softfiles/17136/X12DPG-QR_1.4b_X1.02.61_SUM2.10.0.zip. (Product)
www.supermicro.com/en/support/security_BIOS_Aug_2023 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-34853?: CVE-2023-34853 is a high-severity vulnerability in Supermicro H11dsi, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2023-08-22.
How severe is CVE-2023-34853?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2023-34853 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.