CVE-2020-12358 — Out of bounds write in the firmware for some Intel(R) Processors may allow a privileged user to...

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

• Documented patch — cert-portal.siemens.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Intel Bios, Netapp Aff Bios, Netapp Cloud Backup…).
2. Apply the fixed version or the patch documented under Remediation.
3. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-787 · Out-of-bounds Write

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.30%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
• Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.

Timeline

What happened to this CVE, newest first.

• 2026
• SSVC assessment updated
  Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 13, 2026
• Fix documented
  Oct 13, 2026 · NIST National Vulnerability Database
• CVSS changed · 4.4
  Oct 13, 2026 · NIST National Vulnerability Database
• Source status changed · → Modified
  Oct 13, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 13, 2026 · NIST National Vulnerability Database
• 2021
• CVE published
  Jun 9, 2021 · intel

Source activity

Repeated readings are counted rather than listed.

• 1× References added · Oct 13, 2026 – Oct 13, 2026
• 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

6 on the record

• www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00463.html
  Vendor Advisory, x_refsource_MISC, NIST National Vulnerability Database
• cert-portal.siemens.com/productcert/pdf/ssa-309571.pdf
  Patch, Third Party Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database
• security.netapp.com/advisory/ntap-20210702-0002
  GitHub Security Advisories
• github.com/advisories/GHSA-q9cq-5mrc-rfmq
  GitHub Security Advisories
• security.netapp.com/advisory/ntap-20210702-0002/
  Third Party Advisory, x_refsource_CONFIRM, NIST National Vulnerability Database
• nvd.nist.gov/vuln/detail/CVE-2020-12358
  GitHub Security Advisories

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2021-43975 Out-of-bounds Write in Linux Linux Kernel Nov 17, 2021
• Critical CVE-2021-42013 Apache HTTP Server Path Traversal Vulnerability KEV Oct 7, 2021
• Critical CVE-2021-41773 Apache HTTP Server Path Traversal Vulnerability KEV Oct 5, 2021
• High CVE-2021-22946 A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking... Sep 29, 2021
• Medium CVE-2021-22947 When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using... Sep 29, 2021
• Critical CVE-2021-22945 When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances... Sep 23, 2021

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2020-12358 is "Out of bounds write in the firmware for some Intel(R) Processors may allow a privileged user to...", rated Medium. It affects Bios (Intel); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 4.4 describes technical severity. EPSS 0.30% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.

Sign in or create an account to comment and suggest corrections.