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CVE-2025-40919

17
FAUCET Score

CVE-2025-40919 describes an insecure client nonce (cnonce) generation in Authen::DigestMD5 versions 0.01 and 0.02 for Perl. The cnonce, critical for preventing chosen plaintext attacks and ensuring mutual authentication, is generated using low-entropy sources like PID, epoch time, and a cryptographically weak random function. This vulnerability carries a CVSS score of 6.5 (Medium), indicating a network-exploitable flaw with low attack complexity that could lead to limited confidentiality and integrity impacts. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
SALVAAuthen::DigestMD5
>= 0.01, <= 0.04CNA affecteddefault unaffected

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.27%
Probability of exploitation in next 30 days
EPSS Percentile
19.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0027 is in the 10th percentile among its peer group of 23,725 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

datatracker.ietf.org / doc/html/rfc2831
metacpan.org / release/SALVA/Authen-DigestMD5-0.01/source/DigestMD5.pm