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CVE-2025-34028

From Exploited flaws, HARD’s guide to the flaws being used in attacks · Checked
This article is about a flaw in Commvault Command Center. For every flaw being used in attacks, see Exploited flaws.

CVE-2025-34028 is a security flaw in Commvault Command Center. Attackers can run their own code on Commvault Command Center 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 2 May 2025.[1]

Commvault Command Center 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. Commvault has published a fix or advice.

Description

CISA calls it a path traversal in Commvault Command Center. In its words: “Commvault Command Center contains a path traversal vulnerability that allows a remote, unauthenticated attacker to execute arbitrary code.”[1]

The CVE record adds: “The Commvault Command Center Innovation Release allows an unauthenticated actor to upload ZIP files that represent install packages that, when expanded by the target server, are vulnerable to path traversal vulnerability that can result in Remote Code Execution via malicious JSP. This issue affects Command Center Innovation Release: 11.38.0 to 11.38.20. The vulnerability is fixed in 11.38.20 with SP38-CU20-433 and SP38-CU20-436 and also fixed in 11.38.25 with SP38-CU25-434 and SP38-CU25-438.”[2]

The underlying weakness is path traversal (CWE-22), in MITRE’s list of common software weaknesses.

It scores 10.0 out of 10 on the Common Vulnerability Scoring System, which rates it critical, scored by NVD using CVSS 3.1.[2]

Affected versions

NVD’s record doesn’t list version ranges for it; Commvault’s advisory has them[3]. CISA names the product as Commvault Command Center.

Most families won’t have Commvault Command Center; it’s for whoever looks after IT at work.

Exploitation

CISA added it to its catalog of known exploited vulnerabilities on 2 May 2025, 10 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 May 2025 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 98%. 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

Commvault 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.Commvault Command Center 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 May 2025 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 10.0.[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 98%.[4]

See also

Other Commvault flaws

Other path traversal flaws

  • CVE-2025-61624, Fortinet products: path traversal ·
  • CVE-2021-3199, ONLYOFFICE Docs: server path traversal ·
  • CVE-2026-104286, Fortinet FortiMail: path traversal ·
  • CVE-2026-93616, Check Point products: path traversal ·
  • CVE-2026-66384, JFrog Artifactory: improper limitation of a pathname to a restricted directory ·

Added the same day

  • CVE-2024-58136, Yiiframework Yii: improper protection of alternate path ·

References

  1. ^ Cybersecurity and Infrastructure Security Agency. “Commvault Command Center Path Traversal Vulnerability”. Known Exploited Vulnerabilities Catalog, added 2 May 2025.
  2. ^ National Institute of Standards and Technology. “CVE-2025-34028 Detail”. National Vulnerability Database, published 22 Apr 2025.
  3. ^ Commvault. Advisories and fixes: documentation.commvault.com.
  4. ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.976, percentile 99.9, 31 Oct 2026.
  5. CVE Program. “CVE-2025-34028”. 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.