NVD / CVE Program· CNA Zoom

CVE-2022-22780: Zoom Chat Susceptible to Zip Bombing

Noroxi assessment

Priority: Monitor (action score 27/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.6% (FIRST EPSS); higher than 77% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

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

The Zoom Client for Meetings chat functionality was susceptible to Zip bombing attacks in the following product versions: Android before version 5.8.6, iOS before version 5.9.0, Linux before version 5.8.6, macOS before version 5.7.3, and Windows before version 5.6.3. This could lead to availability issues on the client host by exhausting system resources.

MediumCVSS 6.5 · v3.1—No exploit No fix recorded

Published: Feb 9, 2022
Updated: Jun 17, 2026
EPSS: 1.6% · 77th percentile
CWE: CWE-400

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 26 / 40 · 6.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 1.6%

CNA vs NVD score

NVD: 6.5
CNA · Zoom: 4.7; 1.8 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

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

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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.

Vendor	Product	CPE
zoom	meetings	cpe:2.3:a:zoom:meetings

Affected versions

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

zoom meetingsbefore 5.6.3
zoom meetingsbefore 5.7.3
zoom meetingsbefore 5.8.6
zoom meetingsbefore 5.9.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Zoom). Independent of NVD's CPE analysis and usually ahead of it.

Zoom Video Communications Inc Zoom Client for Meetings for Android
- unspecified and later · before 5.8.6affected
Zoom Video Communications Inc Zoom Client for Meetings for iOS
- unspecified and later · before 5.9.0affected
Zoom Video Communications Inc Zoom Client for Meetings for Linux
- unspecified and later · before 5.8.6affected
Zoom Video Communications Inc Zoom Client for Meetings for macOS
- unspecified and later · before 5.7.3affected
Zoom Video Communications Inc Zoom Client for Meetings for Windows
- unspecified and later · before 5.6.3affected

Same product

zoom: all records

Other highest-scoring records for the same primary product.

CVE-2021-34423Buffer overflow in Zoom client and other products
40Plan
CVE-2021-33907The Zoom Client for Meetings for Windows in all versions before 5.3.0 fails to properly validate the certificate information used to sign .m
40Plan
CVE-2022-28763Improper URL parsing in Zoom Clients
38Monitor

Published before and after this one in the same product

← EarlierCVE-2021-34424Nov 24, 2021 · Process memory exposure in Zoom Client and other products
31Monitor
← EarlierCVE-2021-34425Dec 14, 2021 · Server Side Request Forgery in Zoom Client for Meetings chat
24Monitor
Later →CVE-2022-22781Apr 28, 2022 · Update package downgrade in Zoom Client for Meetings for MacOS
30Monitor

Remediation

Which version to upgrade to

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

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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.

Johnny YuWalmart Global Tech

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.
A user must open a link or visit a page.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

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

nvd-primary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

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

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

explore.zoom.us/en/trust/security/security-bulletin

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

All records