How severe is CVE-2020-35710?

CVE-2020-35710 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-35710 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35710?

CVE-2020-35710 affects Parallels Remote Application Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35710?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-35710 published?

CVE-2020-35710 was published on 2020-12-25 and last updated on 2026-06-17.

CVE-2020-35710

CVE-2020-35710 is a medium-severity vulnerability in Parallels Remote Application Server 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-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Parallels Remote Application Server
Published: 2020-12-25
Last modified: 2026-06-17

Description

Parallels Remote Application Server (RAS) 18 allows remote attackers to discover an intranet IP address because submission of the login form (even with blank credentials) provides this address to the attacker's client for use as a "host" value. In other words, after an attacker's web browser sent a request to the login form, it would automatically send a second request to a RASHTML5Gateway/socket.io URI with something like "host":"192.168.###.###" in the POST data.

Frequently asked questions

What is CVE-2020-35710?: Parallels Remote Application Server (RAS) 18 allows remote attackers to discover an intranet IP address because submission of the login form (even with blank credentials) provides this address to the attacker's client for use as a "host" value. In other words, after an attacker's web browser sent a request to the login form, it would automatically send a second request to a RASHTML5Gateway/socket.io URI with something like "host":"192.168.###.###" in the POST data.
How severe is CVE-2020-35710?: CVE-2020-35710 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-35710 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35710?: CVE-2020-35710 affects Parallels Remote Application Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35710?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-35710 published?: CVE-2020-35710 was published on 2020-12-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:parallels:remote_application_server:18.0:*:*:*:*:*:*:*

More vulnerabilities in Parallels Remote Application Server

CVE-2023-45894 — Critical (CVSS 10.0): The Remote Application Server in Parallels RAS before 19.2.23975 does not segment virtualized applications from the…
CVE-2020-15860 — Critical (CVSS 9.9): Parallels Remote Application Server (RAS) 17.1.1 has a Business Logic Error causing remote code execution. It allows an…
CVE-2022-40870 — High (CVSS 8.1): The Web Client of Parallels Remote Application Server v18.0 is vulnerable to Host Header Injection attacks. This…
CVE-2025-0413 — High (CVSS 7.8): Parallels Desktop Technical Data Reporter Link Following Local Privilege Escalation Vulnerability. This vulnerability…
CVE-2017-9447 — High (CVSS 7.5): In the web interface of Parallels Remote Application Server (RAS) 15.5 Build 16140, a vulnerability exists due to…
CVE-2020-8968 — High (CVSS 7.1): Parallels Remote Application Server (RAS) allows a local attacker to retrieve certain profile password in clear text…

All CVEs affecting Parallels Remote Application Server →

Other CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities

CVE-2026-27604 — Critical (CVSS 10.0): FOSSBilling is a free, open-source billing and client management system. Starting in version 0.5.4 and prior to version…
CVE-2026-40965 — Critical (CVSS 10.0): Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a…
CVE-2026-42826 — Critical (CVSS 10.0): Exposure of sensitive information to an unauthorized actor in Azure DevOps allows an unauthorized attacker to disclose…
CVE-2025-29270 — Critical (CVSS 10.0): Incorrect access control in the realtime.cgi endpoint of Deep Sea Electronics devices DSE855 v1.1.0 to v1.1.26 allows…
CVE-2025-61481 — Critical (CVSS 10.0): An issue in MikroTik RouterOS v.7.14.2 and SwOS v.2.18 exposes the WebFig management interface over cleartext HTTP by…
CVE-2025-53624 — Critical (CVSS 10.0): The Docusaurus gists plugin adds a page to your Docusaurus instance, displaying all public gists of a GitHub user.…

Browse all CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) vulnerabilities →