CVE-2022-37660: w1.fi hostapd Reusing a Nonce, Key Pair in Encryption
Vulnerability summary
CVE-2022-37660 is a medium (CVSS 6.5) Reusing a Nonce, Key Pair in Encryption vulnerability in w1.fi hostapd. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 11-02-2025PublishedVulnerability first disclosed.
- 14-07-2026Last modifiedVulnerability information updated.
Description
In hostapd 2.10 and earlier, the PKEX code remains active even after a successful PKEX association. An attacker that successfully bootstrapped public keys with another entity using PKEX in the past, will be able to subvert a future bootstrapping by passively observing public keys, re-using the encrypting element Qi and subtracting it from the captured message M (X = M - Qi). This will result in the public ephemeral key X; the only element required to subvert the PKEX association.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS trend
Probability
0.38%
Chance of exploitation in the next 30 days
Percentile
30%
Versus all other CVEs
30-day change
0.00 pp
From 0.38% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- wpa< 2:2.10-12+deb12u3 | < 2:2.10-24
Ubuntu1 product
- wpa< 2:2.9-1ubuntu4.6 | < 2:2.10-6ubuntu2.2 | < 2:2.10-21ubuntu0.2
W1.fi1 product
- hostapd≤ 2.10
3 vendors · 3 products
