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NVD / CVE Program· CNA mitre

CVE-2019-16328: In RPyC 4.1.x through 4.1.1, a remote attacker can dynamically modify object attributes to construct a remote procedure call that executes c

Noroxi assessment

Priority: This week (action score 60/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • A ready-made attack tool exists and the flaw can be exploited over the network without an account, so priority is at least “This week”.
  • Probability of exploitation in the next 30 days: 13% (FIRST EPSS); higher than 96.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: python-rpyc (openSUSE:Leap 15.1) 4.1.5-lp151.3.3.1; python-rpyc-test (openSUSE:Leap 15.1) 4.1.5-lp151.3.3.1; python-rpyc (openSUSE:Tumbleweed) 6.0.2-1.5, 6.0.0-1.2.

Don’t wait for the next maintenance window. Upgrade to python-rpyc (openSUSE:Leap 15.1) 4.1.5-lp151.3.3.1; python-rpyc-test (openSUSE:Leap 15.1) 4.1.5-lp151.3.3.1; python-rpyc (openSUSE:Tumbleweed) 6.0.2-1.5, 6.0.0-1.2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In RPyC 4.1.x through 4.1.1, a remote attacker can dynamically modify object attributes to construct a remote procedure call that executes code for an RPyC service with default configuration settings.

HighCVSS 7.5 · v3.1—Weaponized Fix available
Published
Oct 3, 2019
Updated
Jun 16, 2026
EPSS
13.0% · 96th percentile

Report tools

JSON

Action score

60

This week

Don’t wait for the next maintenance window.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
4 / 30 · 13.0%
Ready-made attack tool
26 / 60 · floor: at least 60

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2019-16328

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
rpyc projectrpyc

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • rpyc project rpyc4.1.0 and later · up to 4.1.1 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
openSUSE:Leap 15.1python-rpycbefore 4.1.5-lp151.3.3.14.1.5-lp151.3.3.1
openSUSE:Leap 15.1python-rpyc-testbefore 4.1.5-lp151.3.3.14.1.5-lp151.3.3.1
openSUSE:Tumbleweedpython-rpycbefore 6.0.2-1.56.0.2-1.5
openSUSE:Tumbleweedpython-rpycbefore 6.0.0-1.26.0.0-1.2
PyPIrpycfrom 4.1.0 · before 4.1.24.1.2
PyPIrpycfrom 4.1.0 · before 4.1.14.1.1
SUSE:Package Hub 15 SP1python-rpycbefore 4.1.5-bp151.2.3.14.1.5-bp151.2.3.1
SUSE:Package Hub 15 SP1python-rpyc-testbefore 4.1.5-bp151.2.3.14.1.5-bp151.2.3.1

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
opensuse:python-rpyc4.1.5-lp151.3.3.1 · openSUSE:Leap 15.1Package registry (OSV)
opensuse:python-rpyc-test4.1.5-lp151.3.3.1 · openSUSE:Leap 15.1Package registry (OSV)
PyPI:rpyc4.1.1Package registry (OSV)
PyPI:rpyc4.1.2Package registry (OSV)
suse:python-rpyc4.1.5-bp151.2.3.1 · SUSE:Package Hub 15 SP1Package registry (OSV)
suse:python-rpyc-test4.1.5-bp151.2.3.1 · SUSE:Package Hub 15 SP1Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Metasploit moduleauxiliary/scanner/http/rpyc_rceRPyC 4.1.0 through 4.1.1 Remote Command Executionauxiliary2023-02-19

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Metasploit+1234 d
  3. TodayNov 2, 2026+2587 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records