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CVE-2021-39823

25
FAUCET Score

CVE-2021-39823 is a heap buffer overflow vulnerability affecting Adobe svg-native-viewer and potentially Linux kernels, stemming from insecure handling of malicious .svg files. This vulnerability carries a high CVSS score of 7.8, indicating a significant risk of arbitrary code execution with high impact on confidentiality, integrity, and availability, requiring user interaction for exploitation. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8182d14dfad5d1e10f53ed830328d7d9a3cfa96dCPE matchmatch criteria
cpe:2.3:a:adobe:svg-native-viewer:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.25%
Probability of exploitation in next 30 days
EPSS Percentile
90.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0425 is in the 91st percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

adobepatch availablevia nvd_reference
View patch

References

helpx.adobe.com / security/products/svg-native-viewer/apsb21-72.html
PatchVendor Advisory