CVE-2020-13617: mitel 6863_firmware
Vulnerability summary
CVE-2020-13617 is a high (CVSS 7.5) vulnerability in mitel 6863_firmware. EPSS estimates a 1.33% chance of exploitation in the next 30 days, higher than 70.9% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Timeline
- 26-08-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
The Web UI component of Mitel MiVoice 6800 and 6900 series SIP Phones with firmware before 5.1.0.SP5 could allow an unauthenticated attacker to expose sensitive information due to improper memory handling during failed login attempts.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.33%
Chance of exploitation in the next 30 days
Percentile
71%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.33% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Mitel11 products
- 6863_firmware≤ 5.0 | 5.1 | 5.1:sp1 | 5.1:sp2 | 5.1:sp3 | 5.1:sp4
- 6865_firmware≤ 5.0 | 5.1 | 5.1:sp1 | 5.1:sp2 | 5.1:sp3 | 5.1:sp4
- 6867_firmware≤ 5.0 | 5.1 | 5.1:sp1 | 5.1:sp2 | 5.1:sp3 | 5.1:sp4
- 6869_firmware≤ 5.0 | 5.1 | 5.1:sp1 | 5.1:sp2 | 5.1:sp3 | 5.1:sp4
- 6873_firmware≤ 5.0 | 5.1 | 5.1:sp1 | 5.1:sp2 | 5.1:sp3 | 5.1:sp4
1 vendor · 11 products
References
2 links- www.mitel.com/support/security-advisories/mitel-product-security-advisory-20-0007X Refsource CONFIRMVendor Advisory