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CVE-2021-45293

16
FAUCET Score

CVE-2021-45293 is a Denial of Service vulnerability affecting Binaryen 103, specifically due to an invalid memory address dereference within the wasm::WasmBinaryBuilder::visitLet function. This impacts products such as fedoraproject binaryen, fedoraproject fedora, and webassembly binaryen. The vulnerability has a CVSS score of 5.5 (Medium), indicating it can be triggered by a local attacker with low attack complexity, requiring user interaction, and resulting in high availability impact. Its EPSS score is very low, suggesting a minimal likelihood of exploitation. Currently, there is no evidence of active exploitation, and no public exploit code is available on platforms like Metasploit or ExploitDB. The vulnerability has also received no community discussion or media coverage, aligning with the typical lack of attention for the majority of CVEs.

Impacted Technologies

VendorProductVersion(s)CPE
103CPE matchmatch criteria
cpe:2.3:a:webassembly:binaryen:103:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.78%
Probability of exploitation in next 30 days
EPSS Percentile
52.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0078 is in the 59th percentile among its peer group of 5,765 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 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

github.com / WebAssembly/binaryen/issues/4384
ExploitIssue TrackingPatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/UKGCHPS7UAIOOBGSXDJAUFE5CROTTF6J
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/YCWLB4PWYQO55F7IGNC7KUYN2MFZE3JP