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CVE-2020-15173

29
FAUCET Score

CVE-2020-15173 is a critical buffer overflow vulnerability affecting ACCEL-PPP, an implementation of various tunneling protocols. This flaw allows an unauthenticated attacker to trigger a buffer overflow by sending a specially crafted L2TP control packet with a malformed AVP, leading to a CVSS score of 9.8. The vulnerability can result in complete compromise of confidentiality, integrity, and availability of the affected system. While there is no evidence of active exploitation or public exploit code, the high community discussion indicates significant awareness, and a patch is available.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.12.0-92-g38b6104CPE matchmatch criteria
cpe:2.3:a:accel-ppp:accel-ppp:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.18%
Probability of exploitation in next 30 days
EPSS Percentile
64.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0118 is in the 50th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / accel-ppp/accel-ppp/commit/2324bcd5ba12cf28f47357a8f03cd41b7c04c52b
PatchThird Party Advisory
github.com / accel-ppp/accel-ppp/security/advisories/GHSA-rr68-fchr-69vf
Third Party Advisory