CVE
Quest NetVault Backup unauthenticated denial of service in nvpmgr
Affects Quest NetVault Backup, where the nvpmgr service listens on UDP port 20031 by default. Fixed in NetVault 14.1.3.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 14.1.3
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 14.1.3.
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.80% · 57th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 25/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Quest NetVault Backup is affected by a flaw in its nvpmgr service, which listens on UDP port 20031 by default. A remote attacker can reach it over the network without logging in and crash it, causing a denial of service.
Read the original description
Quest NetVault Backup nvpmgr Integer Underflow Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Quest NetVault Backup. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the nvpmgr service, which listens on UDP port 20031 by default. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before allocating a buffer. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-28744.
Who should check
Teams running Quest NetVault Backup, especially those with the nvpmgr service reachable on UDP port 20031 by default, should check their versions.
Read the source excerpt
“The specific flaw exists within the nvpmgr service, which listens on UDP port 20031 by default.”
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed, reachable over the network without a login · Unknown: Advisories don't say whether default setups are affected
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.5/10CVSS 7.5
- No patch0/5No signal
What would change the score
- Would score about 70 if added to CISA KEV
- Would score about 65 if CISA's SSVC rates exploitation active
- Would score about 30 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 14.1.3.
Check your systems with an agent
Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.
Check whether my systems are affected by CVE-2026-13270 (Quest NetVault Backup nvpmgr Integer Underflow Denial-of-Service Vulnerability), using the cve.now data below.
Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.
What cve.now has for CVE-2026-13270 (entry last updated 2026-11-12):
Affected:
- Quest NetVault Backup: versions 14.0.2.4
Fixed versions: 14.1.3.
Conditions (all must be true for the bug to be hit):
- The nvpmgr service in Quest NetVault Backup is reachable, listening on UDP port 20031 by default. (source: https://www.zerodayinitiative.com/advisories/ZDI-26-889/)
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
Attacker needs: network access, no login, no user action.
CISA KEV: CVE-2026-13270 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-13270 only. If you also check another CVE, look up its own KEV status; never assume it from this one.
How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.
Verify against the linked advisories before concluding, and cite the date you read each one:
- https://www.zerodayinitiative.com/advisories/ZDI-26-889/
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.
Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.
Entry: https://cve.now/CVE-2026-13270
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-13270"}.Timeline
- CVE published
- First seen by cve.now
Affected versions
- Quest NetVault Backup
14.0.2.4
Evidence 3
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Other links · 1
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-13270
Is CVE-2026-13270 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
A flaw in the nvpmgr service lets a crafted request trigger an integer underflow before a buffer allocation, which can crash the NetVault Backup system into a denial-of-service condition.Source: zerodayinitiative.com
Which versions are affected by CVE-2026-13270?
NetVault Backup: version 14.0.2.4.Source: cve.now feed data
Am I affected, and how do I check?
The nvpmgr service is affected when it is reachable, and by default it listens on UDP port 20031. Check the NetVault Backup version in the product's about or version information, and check whether UDP port 20031 is open to the network.Source: zerodayinitiative.com
How do I fix CVE-2026-13270?
Upgrade NetVault Backup to version 14.1.3, which contains the fix.Source: zerodayinitiative.com