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CVE-2021-36770

24
FAUCET Score

CVE-2021-36770 is a local privilege escalation vulnerability affecting Encode.pm in Perl versions up to 5.34.0, specifically impacting Fedora and p5_encode products. It allows an attacker to load a malicious Encode::ConfigLocal library from the current working directory due to an issue with how @INC is evaluated. This vulnerability has a CVSS score of 7.8 (High) due to its potential for high impact on confidentiality, integrity, and availability, with low attack complexity requiring user interaction. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.05, < 3.12CPE matchmatch criteria
cpe:2.3:a:p5-encode_project:p5-encode:*:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

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
1.40%
Probability of exploitation in next 30 days
EPSS Percentile
69.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0140 is in the 68th percentile among its peer group of 11,615 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)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2021-36770Important

perl-Encode: bug in local configuration loading allows arbitrary Perl code execution placed under the current working directory

Aug 9, 2021

References

security.netapp.com / advisory/ntap-20241108-0002
github.com / dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74
PatchThird Party Advisory
github.com / Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9
PatchThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5NDGQSGMEZ75FJGBKNYC75OTO7TF7XHB
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6KOZYD7BH2DNIAEZ2ZL4PJ4QUVQI6Y33
metacpan.org / dist/Encode/changes
Third Party Advisory
news.cpanel.com / unscheduled-tsr-10-august-2021
Third Party Advisory
security.netapp.com / advisory/ntap-20210909-0003
Third Party Advisory
security-tracker.debian.org / tracker/CVE-2021-36770
Third Party Advisory