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CVE-2021-22054

From Exploited flaws, HARD’s guide to the flaws being used in attacks · Checked
This article is about a flaw in Omnissa Workspace One UEM. For every flaw being used in attacks, see Exploited flaws.

CVE-2021-22054 is a security flaw in Omnissa Workspace One UEM. Attackers can make Omnissa Workspace One UEM send requests into the network behind it from anywhere, without logging in. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 9 Mar 2026.[1]

Omnissa Workspace One UEM is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff. Omnissa has published a fix or advice.

Description

CISA calls it a workspace ONE server-side request forgery in Omnissa Workspace One UEM. In its words: “Omnissa Workspace One UEM formerly known as VMware Workspace One UEM contains a server-side request forgery (SSRF) vulnerability that could allow a malicious actor with network access to UEM to send their requests without authentication and to gain access to sensitive information.”[1]

The CVE record adds: “VMware Workspace ONE UEM console 20.0.8 prior to 20.0.8.37, 20.11.0 prior to 20.11.0.40, 21.2.0 prior to 21.2.0.27, and 21.5.0 prior to 21.5.0.37 contain an SSRF vulnerability. This issue may allow a malicious actor with network access to UEM to send their requests without authentication and to gain access to sensitive information.”[2]

The underlying weakness is server-side request forgery (CWE-918), in MITRE’s list of common software weaknesses.

It scores 7.5 out of 10 on the Common Vulnerability Scoring System, which rates it high, scored by NVD using CVSS 3.1.[2]

Affected versions

NVD’s record doesn’t list version ranges for it; Omnissa’s advisory has them[3]. CISA names the product as Omnissa Workspace One UEM.

Most families won’t have Omnissa Workspace One UEM; it’s for whoever looks after IT at work.

Exploitation

CISA added it to its catalog of known exploited vulnerabilities on 9 Mar 2026, 1,543 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 23 Mar 2026 to fix it.[1]

FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at over 99%. That’s in the top 1% of the flaws it scores.[4]

CISA assesses it as automatable: attackers can run it against many targets at once.

CISA doesn’t say who was attacked, or how.

Fix

Omnissa has published a fix or advice.[3] CISA’s required action: “Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”[1]

  1. Check whether you use it.Omnissa Workspace One UEM is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
  2. Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 23 Mar 2026 to fix it.
  3. If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.

You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.

Timeline

DateEvent
The flaw is made public in the National Vulnerability Database, with a severity score of 7.5.[2]
CISA adds it to its catalog of flaws known to be used in attacks.[1]
CISA’s deadline for US government agencies to fix it.[1]
FIRST puts the odds of it being used in attacks in the next 30 days at over 99%.[4]

See also

Other server-side request forgery flaws

  • CVE-2026-96655, Plex Media Server: server-side request forgery (SSRF) ·
  • CVE-2026-96652, Plex Media Server: server-side request forgery (SSRF) ·
  • CVE-2026-83548, SonicWall SMA1000 Appliances: server-side request forgery ·
  • CVE-2026-64849, MLflow: server-side request forgery ·
  • CVE-2026-15409, SonicWall SMA1000 Appliances: server-side request forgery ·

Added the same day

  • CVE-2026-1603, Ivanti Endpoint Manager (EPM): authentication bypass ·
  • CVE-2025-26399, SolarWinds Web Help Desk: deserialization of untrusted data ·

References

  1. ^ Cybersecurity and Infrastructure Security Agency. “Omnissa Workspace ONE Server-Side Request Forgery”. Known Exploited Vulnerabilities Catalog, added 9 Mar 2026.
  2. ^ National Institute of Standards and Technology. “CVE-2021-22054 Detail”. National Vulnerability Database, published 17 Dec 2021.
  3. ^ Omnissa. Advisories and fixes: web.archive.org, vmware.com.
  4. ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.997, percentile 100.0, 31 Oct 2026.
  5. CVE Program. “CVE-2021-22054”. The official CVE record.

This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.