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CVE-2021-32842

20
FAUCET Score

CVE-2021-32842 is a directory traversal vulnerability affecting SharpZipLib versions 1.0.0 through 1.3.2. An attacker could craft a malicious archive to create files outside the intended extraction directory, specifically by exploiting an improperly terminated base directory path. This vulnerability has a CVSS score of 5.3 (Medium), indicating a network-based attack with low complexity and a potential impact of low integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.0.0, < 1.3.3CPE matchmatch criteria
cpe:2.3:a:sharpziplib_project:sharpziplib:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.0MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.5
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.90%
Probability of exploitation in next 30 days
EPSS Percentile
55.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0089 is in the 35th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

nugetpatch availablevia ghsa
Product: SharpZipLibFixed in: 1.3.3

Vendor Advisories (1)

nugetGHSA-mm6g-mmq6-53ffmedium

Path Traversal in SharpZipLib

Feb 1, 2022

References

github.com / icsharpcode/SharpZipLib/releases/tag/v1.3.3
Release NotesThird Party Advisory
securitylab.github.com / advisories/GHSL-2021-125-sharpziplib
ExploitThird Party Advisory