CVE-2020-7520
CVE-2020-7520 is a medium-severity vulnerability in Schneider-electric Software Update Utility with a CVSS 3.x base score of 4.7. 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-601.
Key facts
- Severity: Medium (CVSS 3.x base score 4.7)
- CVSS v2: 4.0
- EPSS exploit prediction: 1% (56th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-601
- Affected product: Schneider-electric Software Update Utility
- Published:
- Last modified:
Description
A CWE-601: URL Redirection to Untrusted Site ('Open Redirect') vulnerability exists in Schneider Electric Software Update (SESU), V2.4.0 and prior, which could cause execution of malicious code on the victim's machine. In order to exploit this vulnerability, an attacker requires privileged access on the engineering workstation to modify a Windows registry key which would divert all traffic updates to go through a server in the attacker's possession. A man-in-the-middle attack is then used to complete the exploit.
Frequently asked questions
- What is CVE-2020-7520?
- A CWE-601: URL Redirection to Untrusted Site ('Open Redirect') vulnerability exists in Schneider Electric Software Update (SESU), V2.4.0 and prior, which could cause execution of malicious code on the victim's machine. In order to exploit this vulnerability, an attacker requires privileged access on the engineering workstation to modify a Windows registry key which would divert all traffic updates to go through a server in the attacker's possession. A man-in-the-middle attack is then used to complete the exploit.
- How severe is CVE-2020-7520?
- CVE-2020-7520 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
- Is CVE-2020-7520 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-7520?
- CVE-2020-7520 affects Schneider-electric Software Update Utility. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-7520?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2020-7520 published?
- CVE-2020-7520 was published on 2020-07-23 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:schneider-electric:software_update_utility:*:*:*:*:*:*:*:*
More vulnerabilities in Schneider-electric Software Update Utility
- CVE-2013-0655 — Critical (CVSS 9.3): The client in Schneider Electric Software Update (SESU) Utility 1.0.x and 1.1.x does not ensure that updates have a…
- CVE-2018-7799 — High (CVSS 7.8): A DLL hijacking vulnerability exists in Schneider Electric Software Update (SESU), all versions prior to V2.2.0, which…
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Other CWE-601 (Open Redirect) vulnerabilities
- CVE-2018-3774 — Critical (CVSS 10.0): Incorrect parsing in url-parse <1.4.3 returns wrong hostname which leads to multiple vulnerabilities such as SSRF, Open…
- CVE-2019-25282 — Critical (CVSS 9.8): V-SOL GPON/EPON OLT Platform v2.03 contains an open redirect vulnerability in the script that allows attackers to…
- CVE-2020-36912 — Critical (CVSS 9.8): Plexus anblick Digital Signage Management 3.1.13 contains an open redirect vulnerability in the 'PantallaLogin' script…
- CVE-2025-43526 — Critical (CVSS 9.8): This issue was addressed with improved URL validation. This issue is fixed in Safari 26.2, macOS Tahoe 26.2. On a Mac…
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- CVE-2024-22891 — Critical (CVSS 9.8): Nteract v.0.28.0 was discovered to contain a remote code execution (RCE) vulnerability via the Markdown link.