CVE-2020-2033
CVE-2020-2033 is a medium-severity vulnerability in Paloaltonetworks Globalprotect with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-290.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 2.9
- EPSS exploit prediction: 1% (51st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-290
- Affected product: Paloaltonetworks Globalprotect
- Published:
- Last modified:
Description
When the pre-logon feature is enabled, a missing certification validation in Palo Alto Networks GlobalProtect app can disclose the pre-logon authentication cookie to a man-in-the-middle attacker on the same local area network segment with the ability to manipulate ARP or to conduct ARP spoofing attacks. This allows the attacker to access the GlobalProtect Server as allowed by configured Security rules for the 'pre-login' user. This access may be limited compared to the network access of regular users. This issue affects: GlobalProtect app 5.0 versions earlier than GlobalProtect app 5.0.10 when the prelogon feature is enabled; GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.4 when the prelogon feature is enabled.
Frequently asked questions
- What is CVE-2020-2033?
- When the pre-logon feature is enabled, a missing certification validation in Palo Alto Networks GlobalProtect app can disclose the pre-logon authentication cookie to a man-in-the-middle attacker on the same local area network segment with the ability to manipulate ARP or to conduct ARP spoofing attacks. This allows the attacker to access the GlobalProtect Server as allowed by configured Security rules for the 'pre-login' user. This access may be limited compared to the network access of regular users. This issue affects: GlobalProtect app 5.0 versions earlier than GlobalProtect app 5.0.10 when the prelogon feature is enabled; GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.4 when the prelogon feature is enabled.
- How severe is CVE-2020-2033?
- CVE-2020-2033 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2020-2033 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-2033?
- CVE-2020-2033 affects Paloaltonetworks Globalprotect. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-2033?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-2033 published?
- CVE-2020-2033 was published on 2020-06-10 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:paloaltonetworks:globalprotect:*:*:*:*:*:windows:*:*
More vulnerabilities in Paloaltonetworks Globalprotect
- CVE-2025-4232 — High (CVSS 8.8): An improper neutralization of wildcards vulnerability in the log collection feature of Palo Alto Networks…
- CVE-2024-5921 — High (CVSS 8.8): An insufficient certification validation issue in the Palo Alto Networks GlobalProtect app enables attackers to connect…
- CVE-2021-3057 — High (CVSS 8.1): A stack-based buffer overflow vulnerability exists in the Palo Alto Networks GlobalProtect app that enables a…
- CVE-2025-0118 — High (CVSS 8.0): A vulnerability in the Palo Alto Networks GlobalProtect app on Windows allows a remote attacker to run ActiveX controls…
- CVE-2024-9473 — High (CVSS 7.8): A privilege escalation vulnerability in the Palo Alto Networks GlobalProtect app on Windows allows a locally…
- CVE-2024-5915 — High (CVSS 7.8): A privilege escalation (PE) vulnerability in the Palo Alto Networks GlobalProtect app on Windows devices enables a…
All CVEs affecting Paloaltonetworks Globalprotect →
Other CWE-290 vulnerabilities
- CVE-2026-48567 — Critical (CVSS 10.0): Authentication bypass by spoofing in Azure HorizonDB allows an unauthorized attacker to elevate privileges over a…
- CVE-2026-6213 — Critical (CVSS 10.0): A vulnerability in Remote Spark SparkView before build 1122 allows an attacker to bypasses the local connection check…
- CVE-2026-39858 — Critical (CVSS 10.0): Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is a high…
- CVE-2025-66570 — Critical (CVSS 10.0): cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.27.0, a vulnerability…
- CVE-2025-34063 — Critical (CVSS 10.0): A cryptographic authentication bypass vulnerability exists in OneLogin AD Connector prior to 6.1.5 due to the exposure…
- CVE-2023-22814 — Critical (CVSS 10.0): An authentication bypass issue via spoofing was discovered in the token-based authentication mechanism that could allow…