CVE-2021-46008: totolink a3100r_firmware Use of Hard-coded Credentials
CVSS: 8.8v3.1HighModified
Published 30-03-2022Last modified 09-07-2026
Vulnerability summary
CVE-2021-46008 is a high (CVSS 8.8) Use of Hard-coded Credentials vulnerability in totolink a3100r_firmware. EPSS estimates a 0.92% chance of exploitation in the next 30 days, higher than 59.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.8/10
010
High · v3.1 (NVD)EPSS score
0.92%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 30-03-2022PublishedVulnerability first disclosed.
- 09-07-2026Last modifiedVulnerability information updated.
Description
In totolink a3100r V5.9c.4577, the hard-coded telnet password can be discovered from official released firmware. An attacker, who has connected to the Wi-Fi, can easily telnet into the target with root shell if the telnet is function turned on.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 8.8Preferred score · NVD (NIST)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.9Preferred score · NVD (NIST)
AV:A/AC:M/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.92%
Chance of exploitation in the next 30 days
Percentile
60%
Versus all other CVEs
30-day change
0.00 pp
From 0.92% on 21-09-2026
21-09-202621-10-2026
EPSS score0.92%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (hackmd.io)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Totolink1 product
- a3100r_firmware5.9c.4577
1 vendor · 1 product