CVE-2021-34551
HIGH
8.1
CVSS Score
Published: June 16, 2021 at 05:23 PM UTC
Updated: June 17, 2026 at 03:56 AM UTC
2 products affected across 2 vendorsFedoraPhpmailer· also runs on 1 platform
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Severity
HIGH8.1
Exploit prediction
EPSS 3%
Description
PHPMailer before 6.5.0 on Windows allows remote code execution if lang_path is untrusted data and has a UNC pathname.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
95%
v < 6.5.0
Affected range stops below 6.5.0, so it looks safe — our inference, not a vendor statement
microsoft-windows (environment)
Runs on — not affected
The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
x_refsource_CONFIRMIssue TrackingThird Party Advisory
Source: [email protected]
https://github.com/PHPMailer/PHPMailer/blob/master/SECURITY.mdVendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YRMWGA4VTMXFB22KICMB7YMFZNFV3EJ/Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJYSOFCUBS67J3TKR74SD3C454N7VTYM/CVSS
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-434
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