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CVE-2021-40858

20
FAUCET Score

CVE-2021-40858 is an arbitrary file disclosure vulnerability affecting Auerswald COMpact 5500R devices prior to version 8.2B. A highly privileged attacker (sub-admin) can exploit this flaw to read sensitive system files, specifically the cleartext administrator password, by manipulating file paths. While rated Medium severity (CVSS 4.9) due to high privileges required, it poses a significant confidentiality risk. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion beyond a single Reddit mention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.0bCPE matchmatch criteria
cpe:2.3:o:auerswald:compact_5500r_ip_firmware:*:*:*:*:*:*:*:*
<= 8.0bCPE matchmatch criteria
cpe:2.3:o:auerswald:compact_5200r_ip_firmware:*:*:*:*:*:*:*:*
<= 8.0bCPE matchmatch criteria
cpe:2.3:o:auerswald:compact_5000r_ip_firmware:*:*:*:*:*:*:*:*
<= 8.0bCPE matchmatch criteria
cpe:2.3:o:auerswald:compact_4000_ip_firmware:*:*:*:*:*:*:*:*
<= 8.0bCPE matchmatch criteria
cpe:2.3:o:auerswald:commander_6000r_ip_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.39%
Probability of exploitation in next 30 days
EPSS Percentile
82.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0239 is in the 92nd percentile among its peer group of 3,565 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/165166/Auerswald-COMpact-8.0B-Arbitrary-File-Disclosure.html
ExploitThird Party AdvisoryVDB Entry
redteam-pentesting.de / advisories/rt-sa-2021-006
ExploitThird Party Advisory
redteam-pentesting.de / en/advisories/-advisories-publicised-vulnerability-analyses
ExploitThird Party Advisory