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Full vulnerability report · 2021
CVE-2021-36770High confidence

n/a — Uncontrolled Search Path Element

n/a · n/a

7.8HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivelibencode-perlUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical record ↗Source updated 4 Sept 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2021-23358

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.

What

Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.

Why

The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the || operator evaluates @INC in a scalar context, and thus @INC has only an integer value.

Why

The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Uncontrolled Search Path Element → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-427

CWE-427: Uncontrolled Search Path Element. The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
UnauthenticatedCWE-427
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2023-0132Oracle Fusion Middleware: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Oracle Fusion Middleware ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

Official advisory
BSI · German · WID-SEC-W-2024-0874Oracle Enterprise Manager: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Enterprise Manager ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.

Official advisory
BSI · German · WID-SEC-W-2024-3476Perl: Schwachstelle ermöglicht Codeausführung

Ein lokaler Angreifer kann eine Schwachstelle in Perl ausnutzen, um beliebigen Programmcode auszuführen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0218Multiples vulnérabilités dans les produits VMware

CVERecord?id=CVE-2021-33574 Référence CVE CVE-2021-3421 https://www.cve.org/CVERecord?id=CVE-2021-3421 Référence CVE CVE-2021-3520 https://www.cve.org/CVERecord?id=CVE-2021-3520 Référence CVE CVE-2021-3521 https://www.cve.org/CVERecord?id=CVE-2021-3521 Référence CVE CVE-2021-3549 https://www.cve.org/CVERecord?id=CVE-2021-3549 Référence CVE CVE-2021-35937 https://www.cve.org/CVERecord?id=CVE-2021-35937 Référence CVE CVE-2021-35938 https://www.cve.org/CVERecord?id=CVE-2021-35938 Référence CVE CVE-2021-35939 https://www.cve.org/CVERecord?id=CVE-2021-35939 Référence CVE CVE-2021-35942 https://www.cve.org/CVERecord?id=CVE-2021-35942 Référence CVE CVE-2021-36770 https://www.cve.org/CVERecord?id=CVE-2021-36770 Référence CVE CVE-2021-36976 https://www.cve.org/CVERecord?id=CVE-2021-36976 Référence CVE CVE-2021-37972 https://www.cve.org/CVERecord?id=CVE-2021-37972 Référence CVE CVE-2021-38604 https://www.cve.org/CVERecord?id=CVE-2021-38604 Référence CVE CVE-2021-39537 https://www.cve.org/CVERecord?id=CVE-2021-39537 Référence CVE CVE-2021-3998 https://www.cve.org/CVERecord?id=CVE-2021-3998 Référence CVE CVE-2021-3999 https://www.cve.org/CVERecord?id=CVE-2021-3999 Référence CVE CVE-2021-4214 https://www.cve.org/CVERecord?id=CVE-2021-4214 Référence CVE CVE-2021-4217 https://www.cve.org/CVERecord?id=CVE-202

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

VERecord?id=CVE-2021-3598 Référence CVE CVE-2021-3605 https://www.cve.org/CVERecord?id=CVE-2021-3605 Référence CVE CVE-2021-3610 https://www.cve.org/CVERecord?id=CVE-2021-3610 Référence CVE CVE-2021-36221 https://www.cve.org/CVERecord?id=CVE-2021-36221 Référence CVE CVE-2021-36222 https://www.cve.org/CVERecord?id=CVE-2021-36222 Référence CVE CVE-2021-36408 https://www.cve.org/CVERecord?id=CVE-2021-36408 Référence CVE CVE-2021-36410 https://www.cve.org/CVERecord?id=CVE-2021-36410 Référence CVE CVE-2021-36411 https://www.cve.org/CVERecord?id=CVE-2021-36411 Référence CVE CVE-2021-3670 https://www.cve.org/CVERecord?id=CVE-2021-3670 Référence CVE CVE-2021-36770 https://www.cve.org/CVERecord?id=CVE-2021-36770 Référence CVE CVE-2021-36976 https://www.cve.org/CVERecord?id=CVE-2021-36976 Référence CVE CVE-2021-3733 https://www.cve.org/CVERecord?id=CVE-2021-3733 Référence CVE CVE-2021-3737 https://www.cve.org/CVERecord?id=CVE-2021-3737 Référence CVE CVE-2021-37600 https://www.cve.org/CVERecord?id=CVE-2021-37600 Référence CVE CVE-2021-37750 https://www.cve.org/CVERecord?id=CVE-2021-37750 Référence CVE CVE-2021-38115 https://www.cve.org/CVERecord?id=CVE-2021-38115 Référence CVE CVE-2021-38297 https://www.cve.org/CVERecord?id=CVE-2021-38297 Référence CVE CVE-2021-38604 https://www.cve.org/CVERecord?id=CVE-

Official advisory
CERT-FR · French · CERTFR-2024-AVI-1103Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2020-25648 Référence CVE CVE-2020-26261 https://www.cve.org/CVERecord?id=CVE-2020-26261 Référence CVE CVE-2020-35521 https://www.cve.org/CVERecord?id=CVE-2020-35521 Référence CVE CVE-2020-35522 https://www.cve.org/CVERecord?id=CVE-2020-35522 Référence CVE CVE-2020-35523 https://www.cve.org/CVERecord?id=CVE-2020-35523 Référence CVE CVE-2020-35524 https://www.cve.org/CVERecord?id=CVE-2020-35524 Référence CVE CVE-2020-36191 https://www.cve.org/CVERecord?id=CVE-2020-36191 Référence CVE CVE-2020-6829 https://www.cve.org/CVERecord?id=CVE-2020-6829 Référence CVE CVE-2021-32862 https://www.cve.org/CVERecord?id=CVE-2021-32862 Référence CVE CVE-2021-36770 https://www.cve.org/CVERecord?id=CVE-2021-36770 Référence CVE CVE-2021-38153 https://www.cve.org/CVERecord?id=CVE-2021-38153 Référence CVE CVE-2021-43138 https://www.cve.org/CVERecord?id=CVE-2021-43138 Référence CVE CVE-2021-45960 https://www.cve.org/CVERecord?id=CVE-2021-45960 Référence CVE CVE-2021-46848 https://www.cve.org/CVERecord?id=CVE-2021-46848 Référence CVE CVE-2022-0561 https://www.cve.org/CVERecord?id=CVE-2022-0561 Référence CVE CVE-2022-0562 https://www.cve.org/CVERecord?id=CVE-2022-0562 Référence CVE CVE-2022-0891 https://www.cve.org/CVERecord?id=CVE-2022-0891 Référence CVE CVE-2022-0908 https://www.cve.org/CVERecord?id=CVE-202

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0959Multiples vulnérabilités dans les produits NetApp

NetApp NTAP-20241108-0002 du 08 novembre 2024 https://security.netapp.com/advisory/ntap-20241108-0002/ Référence CVE CVE-2010-4756 https://www.cve.org/CVERecord?id=CVE-2010-4756 Référence CVE CVE-2017-20162 https://www.cve.org/CVERecord?id=CVE-2017-20162 Référence CVE CVE-2017-20189 https://www.cve.org/CVERecord?id=CVE-2017-20189 Référence CVE CVE-2018-9466 https://www.cve.org/CVERecord?id=CVE-2018-9466 Référence CVE CVE-2021-20086 https://www.cve.org/CVERecord?id=CVE-2021-20086 Référence CVE CVE-2021-23358 https://www.cve.org/CVERecord?id=CVE-2021-23358 Référence CVE CVE-2021-3377 https://www.cve.org/CVERecord?id=CVE-2021-3377 Référence CVE CVE-2021-36770 https://www.cve.org/CVERecord?id=CVE-2021-36770 Référence CVE CVE-2022-24785 https://www.cve.org/CVERecord?id=CVE-2022-24785 Référence CVE CVE-2022-31129 https://www.cve.org/CVERecord?id=CVE-2022-31129 Référence CVE CVE-2022-3715 https://www.cve.org/CVERecord?id=CVE-2022-3715 Référence CVE CVE-2023-22067 https://www.cve.org/CVERecord?id=CVE-2023-22067 Référence CVE CVE-2023-22081 https://www.cve.org/CVERecord?id=CVE-2023-22081 Référence CVE CVE-2023-24998 https://www.cve.org/CVERecord?id=CVE-2023-24998 Référence CVE CVE-2023-26159 https://www.cve.org/CVERecord?id=CVE-2023-26159 Référence CVE CVE-2023-2976 https://www.cve.org/CVERecord?id=CVE

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0529Multiples vulnérabilités dans les produits IBM

/support/pages/node/7157712 Référence CVE CVE-2010-4756 https://www.cve.org/CVERecord?id=CVE-2010-4756 Référence CVE CVE-2017-20162 https://www.cve.org/CVERecord?id=CVE-2017-20162 Référence CVE CVE-2017-20189 https://www.cve.org/CVERecord?id=CVE-2017-20189 Référence CVE CVE-2018-9466 https://www.cve.org/CVERecord?id=CVE-2018-9466 Référence CVE CVE-2019-0231 https://www.cve.org/CVERecord?id=CVE-2019-0231 Référence CVE CVE-2021-20086 https://www.cve.org/CVERecord?id=CVE-2021-20086 Référence CVE CVE-2021-23358 https://www.cve.org/CVERecord?id=CVE-2021-23358 Référence CVE CVE-2021-3377 https://www.cve.org/CVERecord?id=CVE-2021-3377 Référence CVE CVE-2021-36770 https://www.cve.org/CVERecord?id=CVE-2021-36770 Référence CVE CVE-2021-41973 https://www.cve.org/CVERecord?id=CVE-2021-41973 Référence CVE CVE-2022-24785 https://www.cve.org/CVERecord?id=CVE-2022-24785 Référence CVE CVE-2022-24903 https://www.cve.org/CVERecord?id=CVE-2022-24903 Référence CVE CVE-2022-25647 https://www.cve.org/CVERecord?id=CVE-2022-25647 Référence CVE CVE-2022-29622 https://www.cve.org/CVERecord?id=CVE-2022-29622 Référence CVE CVE-2022-31129 https://www.cve.org/CVERecord?id=CVE-2022-31129 Référence CVE CVE-2022-3715 https://www.cve.org/CVERecord?id=CVE-2022-3715 Référence CVE CVE-2023-22067 https://www.cve.org/CVERecord?id=CV

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
n/a
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 11 Aug 2021 · Last source change 3 Nov 2025, 21:45 UTC · CWE-427 · Uncontrolled Search Path Element

CVE recordCVE.org · 5.2
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2021-23358
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2021-36770 · cve.blacktree.nl