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CVE-2021-24117

19
FAUCET Score

CVE-2021-24117 is a side-channel vulnerability in Apache Teaclave Rust SGX SDK 1.1.3 that affects the base64 PEM file decoding process. This flaw allows system-level attackers to potentially extract sensitive RSA key information from software running in isolated environments like Intel SGX. Rated as MEDIUM severity (CVSS 4.9), it requires high privileges and low attack complexity, with a high impact on confidentiality. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.1.3CPE matchmatch criteria
cpe:2.3:a:apache:teaclave_sgx_sdk:1.1.3:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.22%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0222 is in the 90th percentile among its peer group of 3,566 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

docs.rs / crate/sgx_tstd/1.1.1
ProductThird Party Advisory
github.com / dingelish/rust-base64/commit/a554b7ae880553db6dde8a387101a093911d5b2a
Issue TrackingPatchThird Party Advisory
github.com / UzL-ITS/util-lookup/blob/main/cve-vulnerability-publication.md
PatchThird Party Advisory