NVD / CVE Program· CNA cisco

CVE-2022-20824: Cisco FXOS and NX-OS Software Cisco Discovery Protocol Denial of Service and Arbitrary Code Execution Vulnerability

Noroxi assessment

Priority: Monitor (action score 35/100)

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: 0.39% (FIRST EPSS).
Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

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

A vulnerability in the Cisco Discovery Protocol feature of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper input validation of specific values that are within a Cisco Discovery Protocol message. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges or cause the Cisco Discovery Protocol process to crash and restart multiple times, which would cause the affected device to reload, resulting in a DoS condition. Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

HighCVSS 8.8 · v3.1—No exploit No fix recorded

BDU:2022-05291

Published: Aug 25, 2022
Updated: Jun 17, 2026
EPSS: 0.3% · 33th percentile
CWE: CWE-121

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Action score

Monitor

Low priority for now.

CVSS: 35 / 40 · 8.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 8.8
CNA · cisco: 8.8; agree

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
cisco	mds 9506 firmware	cpe:2.3:o:cisco:mds_9506_firmware
cisco	mds 9506	cpe:2.3:h:cisco:mds_9506
cisco	mds 9513 firmware	cpe:2.3:o:cisco:mds_9513_firmware
cisco	mds 9513	cpe:2.3:h:cisco:mds_9513
cisco	mds 9706 firmware	cpe:2.3:o:cisco:mds_9706_firmware
cisco	mds 9706	cpe:2.3:h:cisco:mds_9706
cisco	mds 9710 firmware	cpe:2.3:o:cisco:mds_9710_firmware
cisco	mds 9710	cpe:2.3:h:cisco:mds_9710
cisco	mds 9718 firmware	cpe:2.3:o:cisco:mds_9718_firmware
cisco	mds 9718	cpe:2.3:h:cisco:mds_9718
cisco	nexus 1000v firmware	cpe:2.3:o:cisco:nexus_1000v_firmware
cisco	nexus 1000v	cpe:2.3:h:cisco:nexus_1000v

and 188 more

Affected versions

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

cisco mds 9506 firmwareall versions
cisco mds 9513 firmwareall versions
cisco mds 9706 firmwareall versions
cisco mds 9710 firmwareall versions
cisco mds 9718 firmwareall versions
cisco nexus 1000v firmwareall versions
cisco nexus 3016 firmwareall versions
cisco nexus 3016q firmwareall versions
cisco nexus 3048 firmwareall versions
cisco nexus 3064 firmwareall versions
cisco nexus 3064-32t firmwareall versions
cisco nexus 3064-t firmwareall versions
cisco nexus 3064-x firmwareall versions
cisco nexus 3064t firmwareall versions
cisco nexus 3064x firmwareall versions
cisco nexus 3100 firmwareall versions
cisco nexus 3100-v firmwareall versions
cisco nexus 3100-z firmwareall versions
cisco nexus 3100v firmwareall versions
cisco nexus 31108pc-v firmwareall versions

Versions reported by the vendor

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

Cisco Cisco NX-OS Software
- n/aaffected

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.

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.

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Bug bounty scope

No known public program.

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