HOMEVULNERABILITIESCVE-2020-35710
MEDIUM

CVE-2020-35710

CWE-200Published: December 25, 2020· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-35710 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

parallels1 product(s)
remote application server
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://twitter.com/amadapa/status/1342407005110218753
ADVISORYhttps://www.elladodelmal.com/2020/12/blue-team-red-team-como-parallels-ras.html
ADVISORYhttps://twitter.com/amadapa/status/1342407005110218753
ADVISORYhttps://www.elladodelmal.com/2020/12/blue-team-red-team-como-parallels-ras.html

All References (4)

→
https://twitter.com/amadapa/status/1342407005110218753Third Party Advisory
→
https://www.elladodelmal.com/2020/12/blue-team-red-team-como-parallels-ras.htmlExploit · Third Party Advisory
→
https://twitter.com/amadapa/status/1342407005110218753Third Party Advisory
→
https://www.elladodelmal.com/2020/12/blue-team-red-team-como-parallels-ras.htmlExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-35710
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-200
CISA KEVNo
Affected1 vendor(s)
PublishedDec 25, 2020

Related CVEs (CWE-200)

CVE-2022-29165
10.0
CVE-2025-61481
10.0
CVE-2010-1230
10.0
CVE-2020-13702
10.0
CVE-2025-29270
10.0
CVE-2008-3914
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-35710 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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