Is CVE-2024-27355 actively exploited?

CVE-2024-27355 has no public evidence of in-the-wild exploitation as of 2025-09-15.

What is the CVSS score for CVE-2024-27355?

CVE-2024-27355 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2024-27355?

Patch guidance is available from phpseclib security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2024-27355.

Fix CVE-2024-27355 - HIGH phpseclib phpseclib

Q: Which products are affected by CVE-2024-27355?

4 products: phpseclib phpseclib, phpseclib phpseclib, phpseclib phpseclib, debian debian linux.

Description

An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. When processing the ASN.1 object identifier of a certificate, a sub identifier may be provided that leads to a denial of service (CPU consumption for decodeOID).

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-400

Metadata

Primary Vendor: PHPSECLIB
Published: 3/1/2024
Last Modified: 9/15/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

phpseclib : phpseclibphpseclib : phpseclibphpseclib : phpseclibdebian : debian_linux

Remediation Guidance

Executive Summary

Cite this page

CVE-2024-27355. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2024-27355

View on NIST NVD

CVE-2024-27355 vulnerability