This vulnerability allows local attackers to escalate privileges on affected installations of SolarWinds Orion Virtual Infrastructure Monit…

published 2021-04-22 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-14042

cvss: 7.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits: 0; none known

This vulnerability allows local attackers to escalate privileges on affected installations of SolarWinds Orion Virtual Infrastructure Monitor 2020.2. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the OneTimeJobSchedulerEventsService WCF service. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-11955.

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.0	7.8	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C

Affected products

SolarWinds Orion Virtual Infrastructure Monitor

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

documentation.solarwinds.com /en/Success_Center/SAM/Content/Release_Notes/SAM_2020-2-5_release_notes.htm#Fixed
release-notes, vendor-advisory
zerodayinitiative.com /advisories/ZDI-21-373/
third-party-advisory, vdb-entry

Sources

CVE List CVE-2021-27277
NVD CVE-2021-27277

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Summary