CVE-2022-20817: Cisco IP Phone Duplicate Key Vulnerability
Noroxi assessment
Priority: Monitor (action score 29/100)
- 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: 1.2% (FIRST EPSS); higher than 69% 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. Special conditions such as timing or configuration are required.
- 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 Cisco Unified IP Phones could allow an unauthenticated, remote attacker to impersonate another user's phone if the Cisco Unified Communications Manager (CUCM) is in secure mode. This vulnerability is due to improper key generation during the manufacturing process that could result in duplicated manufactured keys installed on multiple devices. An attacker could exploit this vulnerability by performing a machine-in-the-middle attack on the secure communication between the phone and the CUCM. A successful exploit could allow the attacker to impersonate another user's phone. This vulnerability cannot be addressed with software updates. There is a workaround that addresses this vulnerability.
- Published
- Jun 15, 2022
- Updated
- Jun 17, 2026
- EPSS
- 1.2% · 69th percentile
- CWE
- CWE-338
Report tools
Action score
29
Monitor
Low priority for now.
- CVSS
- 29 / 40 · 7.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 7.4
- CNA · cisco
- 7.4
- 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.
We use this product, ask for helpAffected 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 | unified ip phone 6911 firmware | cpe:2.3:o:cisco:unified_ip_phone_6911_firmware |
| cisco | unified ip phone 6911 | cpe:2.3:h:cisco:unified_ip_phone_6911 |
| cisco | unified ip phone 6921 firmware | cpe:2.3:o:cisco:unified_ip_phone_6921_firmware |
| cisco | unified ip phone 6921 | cpe:2.3:h:cisco:unified_ip_phone_6921 |
| cisco | unified ip phone 6941 firmware | cpe:2.3:o:cisco:unified_ip_phone_6941_firmware |
| cisco | unified ip phone 6941 | cpe:2.3:h:cisco:unified_ip_phone_6941 |
| cisco | unified ip phone 6945 firmware | cpe:2.3:o:cisco:unified_ip_phone_6945_firmware |
| cisco | unified ip phone 6945 | cpe:2.3:h:cisco:unified_ip_phone_6945 |
| cisco | unified ip phone 6961 firmware | cpe:2.3:o:cisco:unified_ip_phone_6961_firmware |
| cisco | unified ip phone 6961 | cpe:2.3:h:cisco:unified_ip_phone_6961 |
| cisco | unified ip phone 8941 firmware | cpe:2.3:o:cisco:unified_ip_phone_8941_firmware |
| cisco | unified ip phone 8941 | cpe:2.3:h:cisco:unified_ip_phone_8941 |
and 10 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- cisco ata 187 analog telephone adapter firmwareall versions
- cisco unified ip phone 6911 firmwareall versions
- cisco unified ip phone 6921 firmwareall versions
- cisco unified ip phone 6941 firmwareall versions
- cisco unified ip phone 6945 firmwareall versions
- cisco unified ip phone 6961 firmwareall versions
- cisco unified ip phone 8941 firmwareall versions
- cisco unified ip phone 8945 firmwareall versions
- cisco unified ip phone 8961 firmwareall versions
- cisco unified ip phone 9951 firmwareall versions
- cisco unified ip phone 9971 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 IP Phones with Multiplatform Firmware
- 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 researchersFinders, 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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-22-0428 · Jun 16, 2022(Cisco Güvenlik Zafiyeti)
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.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-338 · Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.