CVE-2023-27989: zyxel lte7480-m804_firmware Classic Buffer Overflow
CVSS: 6.5v3.1MediumModified
Published 05-06-2023Last modified 08-01-2025
Vulnerability summary
CVE-2023-27989 is a medium (CVSS 6.5) Classic Buffer Overflow vulnerability in zyxel lte7480-m804_firmware. EPSS estimates a 1.02% chance of exploitation in the next 30 days, higher than 62.7% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
1.02%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 05-06-2023PublishedVulnerability first disclosed.
- 08-01-2025Last modifiedVulnerability information updated.
Description
A buffer overflow vulnerability in the CGI program of the Zyxel NR7101 firmware versions prior to V1.00(ABUV.8)C0 could allow a remote authenticated attacker to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.
CVSS metrics
2 scores · 2 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 2 agree
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.02%
Chance of exploitation in the next 30 days
Percentile
63%
Versus all other CVEs
30-day change
0.00 pp
From 1.02% on 20-09-2026
20-09-202620-10-2026
EPSS score1.02%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Zyxel5 products
- lte7480-m804_firmware≤ 1.00\(abra.6\)c0
- lte7490-m904_firmware≤ 1.00\(abqy.5\)c0
- nebula_nr7101_firmware≤ 1.15\(accc.3\)c0
- nr7101_firmware≤ 1.00\(abuv.7\)c0
- nr7101 firmware< V1.00(ABUV.8)C0
1 vendor · 5 products