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No exploitation reported

CVE-2021-20132

No exploitation reported by the sources we read.

  • Published2021-12-30
  • WeaknessCWE-798

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 use default hard-coded credentials, which can allow a remote attacker to gain administrative access to the zebra or ripd those services. Both are running with root privileges on the router (i.e., as the "admin" user, UID 0).

Timeline

dates in UTC
  1. 2021-12-3022:15CVE publishedNVD

Versions per branch

NVD
Dlink dir-2640-us firmwareversion to verify
BranchAffectedFixed in
1.11≤ 1.11b02no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-12-30
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-8v3c-9hr5-hqm7

Frequently asked questions

What is CVE-2021-20132?

Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 use default hard-coded credentials, which can allow a remote attacker to gain administrative access to the zebra or ripd those services. Both are running with root privileges on the router (i.e., as the "admin" user, UID 0).

Is CVE-2021-20132 actively exploited?

Active exploitation of CVE-2021-20132 has not been confirmed. Its EPSS score was 4.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-20132?

CVE-2021-20132 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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