Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L H H N C H H H 7.5 .0028 21.0 —
AFFECTED Product Versions Fixed n/a n/a – —
TIMELINE Jan 6 Reserved by mitre Feb 3 Published (CNA: mitre) Aug 11 ENRICHED — CVE-2020-5953. Received CVSS 7.5 and CPE data from NVD.
A vulnerability exists in System Management Interrupt (SWSMI) handler of InsydeH2O UEFI Firmware code located in SWSMI handler that dereferences gRT (EFI_RUNTIME_SERVICES) pointer to call a GetVariable service, which is located outside of SMRAM. This can result in code execution in SMM (escalating privilege from ring 0 to ring -2).
| Date | Event | Detail |
|---|---|---|
| January 6, 2020 | Reserved | Reserved by mitre |
| February 3, 2022 | Published | Published (CNA: mitre) |
| August 11, 2026 | ENRICHED | ENRICHED — CVE-2020-5953. Received CVSS 7.5 and CPE data from NVD. |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| n/a | n/a | — | n/a | — |
Authoritative record: CVE-2020-5953 at cve.org
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-5953 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.